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A209948 Half the number of (n+1)X6 0..2 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference 1
112464, 35537484, 11189540644, 3526904366260, 1111386232102422, 350242477812932534, 110373178905015566530, 34782520556714032712454, 10961190840267256826077092, 3454257261045758138781020608 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A209951
LINKS
FORMULA
Empirical: a(n) = 226*a(n-1) +45099*a(n-2) -3802308*a(n-3) -572882285*a(n-4) +18570587380*a(n-5) +2505373760798*a(n-6) -56035529217349*a(n-7) -4824026074848048*a(n-8) +120127039293879218*a(n-9) +4292609740013923045*a(n-10) -141563746476260334799*a(n-11) -1493190656748529334936*a(n-12) +86650801015295538128525*a(n-13) -146299002206934758830268*a(n-14) -27281515787888910095830989*a(n-15) +250854154105766481821626279*a(n-16) +4057413127580884380322983768*a(n-17) -70522922545544867871443241624*a(n-18) -161974399956584678819171540730*a(n-19) +9154377654106289311969523689263*a(n-20) -27153839406967262425019096961652*a(n-21) -627729213153606623317188880498538*a(n-22) +4028750878155394947692981287518666*a(n-23) +23837236802125260903001128557346624*a(n-24) -255275145258747087907494680302618892*a(n-25) -454756875148688370693609267288846728*a(n-26) +9886301212872784811297184141522673454*a(n-27) +207861834111977968669626713136404536*a(n-28) -263852021207389100875535133060540548362*a(n-29) +219146245417550582858527663832896444925*a(n-30) +5188530246433111039381719279753185958978*a(n-31) -6068431136152018660789540244077138100424*a(n-32) -78343428936204421264341470580147735220032*a(n-33) +89746004117653371795846353004332877329450*a(n-34) +926383485888606747085048168183344761837133*a(n-35) -798075770972170183784338136346895249238479*a(n-36) -8565366785118536576114352638182257252881644*a(n-37) +3651609174622058873190442505905889548736452*a(n-38) +60726996189809902994100129072192988911319019*a(n-39) +3734102209810086732392055158929267222108418*a(n-40) -319735834696326571001647910481343546583917797*a(n-41) -174289062209343941657029057077647463628080956*a(n-42) +1199285243674817050205728243054801882941971389*a(n-43) +1230755979252520199717429765925632875304733440*a(n-44) -3023566925033061462791975269479786880690855594*a(n-45) -4809450963656736045558788246417171174245951808*a(n-46) +4556954374137288130437519242475924325606709076*a(n-47) +11807371177582129227649311102077401644671082800*a(n-48) -2384939844300789186861508920001970059000057736*a(n-49) -18708676414548572499805084043855873435540745088*a(n-50) -4776615542904050582741570054403728041045265344*a(n-51) +18920837027586210467287696349121372849987235840*a(n-52) +11539642131208389315154765643978961864176138496*a(n-53) -11577786944871923616781855979019942154881932288*a(n-54) -11737125353166356093480915432462138059856923648*a(n-55) +3559781467415051516661302948474812385996942336*a(n-56) +6897020970017086931854924711358751570789113856*a(n-57) +74255349448976175925687479928104982431604736*a(n-58) -2493299779522211735238271659353209451142496256*a(n-59) -477228835103151621153886948946570341759434752*a(n-60) +561387906103344228183295953260090329535938560*a(n-61) +177608082114965254276620968965143042165309440*a(n-62) -78106022363913711243912567430268161587937280*a(n-63) -32949868681058323559038646014919276424069120*a(n-64) +6583630730503042245049525261468886955458560*a(n-65) +3484926982859936833103382835351102011998208*a(n-66) -332064270216022566669371929716642835070976*a(n-67) -212671592732967433548860280193747408388096*a(n-68) +10615818332349065507178740786161262788608*a(n-69) +7198538182251749407225322137057138573312*a(n-70) -255052097809131091902007919143509032960*a(n-71) -122879866247305854370887115201004437504*a(n-72) +4592723849156643504471280722720587776*a(n-73) +888432506487701148139077933511737344*a(n-74) -39247403952271037516018916429660160*a(n-75) -1682690016938995573730247515832320*a(n-76) +74422834126415557464612856135680*a(n-77)
EXAMPLE
Some solutions for n=4
..1..0..1..0..0..0....1..2..1..0..1..2....2..0..2..2..1..0....1..2..1..1..1..1
..0..0..0..0..2..2....1..2..1..0..1..2....2..1..1..0..2..2....1..0..1..2..1..2
..2..2..1..0..2..0....1..2..1..1..1..1....0..1..0..2..1..0....0..2..2..2..2..0
..1..2..2..2..1..2....0..2..2..1..2..1....2..1..0..2..0..2....0..1..0..2..0..1
..2..2..0..2..1..2....2..2..1..1..1..1....1..1..1..2..0..2....2..0..2..1..0..2
CROSSREFS
Sequence in context: A206071 A250526 A251064 * A269887 A269766 A177275
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)