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A205024 Number of (n+1)X6 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 1
456043, 56088455, 5296848762, 674941613200, 69845358912381, 8486771114466915, 932371404894182926, 109561074506695905962, 12338089575965774952460, 1427567267518712591956614, 162367994267402414700095695 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A205027

LINKS

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

FORMULA

Empirical: a(n) = 421*a(n-1) -62769*a(n-2) +2310733*a(n-3) +403681451*a(n-4) -49828361823*a(n-5) +1096150488123*a(n-6) +151580898127185*a(n-7) -11048897000431539*a(n-8) +51611749500818263*a(n-9) +22817652483868984205*a(n-10) -857835847261686110649*a(n-11) -9374458003478373300775*a(n-12) +1368576005785748677814059*a(n-13) -24088204931257582949852631*a(n-14) -709973289257669681535959589*a(n-15) +34065404545988953049366832624*a(n-16) -200557510264055513432569055112*a(n-17) -15666942594241527290959028754816*a(n-18) +366699652483671704645973151004160*a(n-19) +556866557348482547313487599697920*a(n-20) -137000518242378604173176974535632896*a(n-21) +1769071207508724673127674015675932672*a(n-22) +11220815540480229346557080946921873408*a(n-23) -518646763035220833423313314698685579264*a(n-24) +4024249653201735150174190088150935732224*a(n-25) +34919994920892476026952096202255394406400*a(n-26) -871552896677931229969265084012279419109376*a(n-27) +4622301837154033172635652972527999694929920*a(n-28) +36186609634555199966126177369453034718887936*a(n-29) -646009913293904983923911348038538571571789824*a(n-30) +2874086111336740116494389083702465427320864768*a(n-31) +11125367865532159426470102313822598656023330816*a(n-32) -192497150904720731144721894692294522568368455680*a(n-33) +859434535771414620395034687981431201377497907200*a(n-34) -18603014768137535344969253758055317419728044032*a(n-35) -18137662986256990512253856856691994772747753357312*a(n-36) +97144256330983166420733686721810612879470729625600*a(n-37) -262139181133344798834958693848280561135269401591808*a(n-38) +366749960524199960628003578667207498278188640894976*a(n-39) -95937539221125073217632394688979337042506675126272*a(n-40) -515381325923503605021008996037746626710263977476096*a(n-41) +779625227052887816002484906548664097922704683827200*a(n-42) -353575334861315228430111498007879111317305425920000*a(n-43) -80128699449390765016589477336026202656210944000000*a(n-44) +81118571876906359996545672577590274660761600000000*a(n-45) for n>60

EXAMPLE

Some solutions for n=4

..1..1..0..2..1..3....3..0..0..2..1..3....2..2..3..2..0..2....0..2..1..2..0..2

..0..0..0..2..1..3....2..0..0..2..1..3....3..2..2..1..0..2....3..0..0..0..0..3

..2..1..0..0..0..0....3..0..0..2..1..3....3..2..2..1..0..3....2..0..0..3..0..0

..0..0..0..3..3..0....3..0..0..2..1..3....3..2..2..1..0..0....3..0..0..0..0..3

..0..2..0..2..2..0....0..0..0..0..0..1....3..2..2..1..0..1....3..0..3..1..0..2

CROSSREFS

Sequence in context: A134888 A237867 A234427 * A207299 A233926 A210402

Adjacent sequences:  A205021 A205022 A205023 * A205025 A205026 A205027

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 21 2012

STATUS

approved

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Last modified August 28 05:09 EDT 2015. Contains 261118 sequences.