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A183617 1/120 the number of (n+1)X5 0..4 arrays with every 2X2 subblock containing four distinct values 1
216, 4992, 115760, 2708848, 63632480, 1498220176, 35321033072, 833329037376, 19669285954672, 464377424786608, 10965243510496992, 258942543673642320, 6115202229118671536, 144421327114372301632, 3410825769986070048176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183622

LINKS

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

FORMULA

Empirical: a(n)=49*a(n-1)-749*a(n-2)+2986*a(n-3)+18914*a(n-4)-143912*a(n-5)-25696*a(n-6)+1494272*a(n-7)-1042432*a(n-8)-3600384*a(n-9)+917504*a(n-10)+393216*a(n-11)

EXAMPLE

Some solutions with the first square being 0123 for 3X5

..0..1..0..3..2....0..1..4..3..2....0..1..0..2..0....0..1..0..3..4

..2..3..4..1..0....2..3..2..0..4....2..3..4..3..1....2..3..4..2..1

..0..1..0..3..4....4..0..4..3..2....1..0..2..0..2....4..0..1..0..4

CROSSREFS

Sequence in context: A017343 A269190 A017463 * A114060 A128964 A096290

Adjacent sequences:  A183614 A183615 A183616 * A183618 A183619 A183620

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2011

STATUS

approved

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Last modified October 16 03:37 EDT 2019. Contains 328040 sequences. (Running on oeis4.)