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

28, 729, 11325, 180712, 2601925, 33118416, 369163839, 3630637294, 31856129416, 252318062428, 1823504154187, 12137736643546, 75012367805101, 433388500017180, 2354668881960077, 12091925893979800, 58950535990057164

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