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A183598 1/6 the number of (n+1)X5 0..2 arrays with every 2X2 subblock containing all three values 1
534, 10797, 201770, 3831324, 72592860, 1376627608, 26108240340, 495215814566, 9393691937690, 178194216929170, 3380332407037684, 64125402470512942, 1216476053110547726, 23076960013228726054, 437778595866783333858 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183603

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=29*a(n-1)-116*a(n-2)-2075*a(n-3)+10702*a(n-4)+51511*a(n-5)-261497*a(n-6)-510094*a(n-7)+2707193*a(n-8)+1565260*a(n-9)-12569843*a(n-10)+2644843*a(n-11)+22771798*a(n-12)-13641330*a(n-13)-14269732*a(n-14)+12528656*a(n-15)+1720808*a(n-16)-3240288*a(n-17)+392640*a(n-18)+109056*a(n-19)

EXAMPLE

Some solutions with a(1,1)=0 for 3X5

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

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

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

CROSSREFS

Sequence in context: A160176 A077085 A165989 * A252536 A067723 A252275

Adjacent sequences:  A183595 A183596 A183597 * A183599 A183600 A183601

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 05 2011

STATUS

approved

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Last modified October 1 07:48 EDT 2022. Contains 357135 sequences. (Running on oeis4.)