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A226991 Number of nX5 0..4 arrays of sums of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
28, 729, 11325, 180712, 2601925, 33118416, 369163839, 3630637294, 31856129416, 252318062428, 1823504154187, 12137736643546, 75012367805101, 433388500017180, 2354668881960077, 12091925893979800, 58950535990057164 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A226992

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A185987 A004293 A012808 * A277060 A229463 A097834

Adjacent sequences:  A226988 A226989 A226990 * A226992 A226993 A226994

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 25 2013

STATUS

approved

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Last modified November 12 22:10 EST 2019. Contains 329079 sequences. (Running on oeis4.)