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A204836 Number of (n+1)X5 0..2 arrays with the permanents of all 2X2 subblocks equal and nonzero 1
804, 6370, 34100, 247108, 1438706, 9984856, 60562860, 410479794, 2552400534, 17058516514, 107804975078, 714404539258, 4564334647690, 30092904093630, 193703648109910, 1273255187793270, 8238258468126064, 54058768940775828 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204840

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 16*a(n-1) +138*a(n-2) -3388*a(n-3) -4166*a(n-4) +326715*a(n-5) -456632*a(n-6) -19052827*a(n-7) +55274462*a(n-8) +752110302*a(n-9) -3042338996*a(n-10) -21286830257*a(n-11) +109442683323*a(n-12) +444952891344*a(n-13) -2860961797884*a(n-14) -6922784197309*a(n-15) +57235992790257*a(n-16) +78328492438787*a(n-17) -904048049110470*a(n-18) -576669063421264*a(n-19) +11511558540437540*a(n-20) +1114293610632689*a(n-21) -119921234164107504*a(n-22) +39086190201475225*a(n-23) +1032982731618338211*a(n-24) -695476504306389628*a(n-25) -7413281737495209156*a(n-26) +7219723821839974167*a(n-27) +44548439672038469463*a(n-28) -55658495148806677395*a(n-29) -224759471938392915676*a(n-30) +341379620112918395746*a(n-31) +952206719247257760884*a(n-32) -1716782674417798691909*a(n-33) -3377280054557779836326*a(n-34) +7191696449726777470051*a(n-35) +9951393791041738642301*a(n-36) -25320068670462374058660*a(n-37) -23971153495360819414512*a(n-38) +75292639384011589097177*a(n-39) +45586830933781858176749*a(n-40) -189510034468576011711203*a(n-41) -62414934898234976808734*a(n-42) +403718856379207501794880*a(n-43) +39716591317027155288028*a(n-44) -726389005261260972732291*a(n-45) +73904754756251655293812*a(n-46) +1099030659215273510498779*a(n-47) -310444848701355772200220*a(n-48) -1388378043650375197156018*a(n-49) +631298271752259744595870*a(n-50) +1448336706799690267124013*a(n-51) -914597352111896583707347*a(n-52) -1226077192265646111400120*a(n-53) +1021625778832877850856548*a(n-54) +817447750222201551208585*a(n-55) -901043841475176609565370*a(n-56) -403943153752648873902763*a(n-57) +629686908617007725115246*a(n-58) +124050803140828654585754*a(n-59) -345782932240664284335838*a(n-60) -1116112325488736921106*a(n-61) +146338360110467438560104*a(n-62) -23292145154695569193808*a(n-63) -46088370146397403597948*a(n-64) +14421084581512793544720*a(n-65) +10107008732172383494028*a(n-66) -4999251270768805523396*a(n-67) -1308872491318731960056*a(n-68) +1095924493390435290280*a(n-69) +32211622136458445072*a(n-70) -146501383199919759888*a(n-71) +18617977271887828704*a(n-72) +10022307856768942304*a(n-73) -2773414736468978688*a(n-74) -122047671377057664*a(n-75) +123993088540657920*a(n-76) -15154807190999040*a(n-77) +503974741515264*a(n-78)

EXAMPLE

Some solutions for n=4

..0..2..1..2..1....2..1..0..1..2....1..1..1..0..1....2..1..1..2..2

..1..2..0..2..0....2..0..2..1..0....2..0..2..2..2....0..1..1..0..1

..0..2..1..2..1....2..1..0..1..2....1..1..1..0..1....2..2..0..2..2

..1..2..0..2..0....2..0..2..0..2....2..0..2..2..1....0..1..1..0..1

..1..0..1..2..1....0..1..2..1..0....1..1..1..0..1....2..1..1..2..0

CROSSREFS

Sequence in context: A246898 A205050 A202586 * A267932 A267979 A249877

Adjacent sequences:  A204833 A204834 A204835 * A204837 A204838 A204839

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 2012

STATUS

approved

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Last modified October 19 11:26 EDT 2019. Contains 328216 sequences. (Running on oeis4.)