A255755 Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally

794128, 778827, 551068, 619142, 553072, 652833, 739776, 1010588, 1167904, 1647077, 2006720, 3026536, 3618544, 5468116, 6840960, 10854544, 13156336, 20486224, 25908560, 41893728, 51031728, 80282112, 101902288, 165773792

Offset

1,1

Comments

Column 7 of A255756

Links

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

Formula

Empirical: a(n) = 2*a(n-1) -a(n-2) +4*a(n-4) -8*a(n-5) +4*a(n-6) for n>20

Example

Some solutions for n=1
..0..0..0..1..0..0..0..0..1....0..0..0..1..0..0..0..1..1
..1..1..1..0..1..1..0..1..1....0..1..1..0..1..1..1..0..0
..0..0..1..0..1..0..0..0..1....0..1..1..0..1..0..0..0..1

Crossrefs

Cf. A255756

Sequence in context: A187295 A234244 A255762 * A254844 A259304 A151561

Adjacent sequences: A255752 A255753 A255754 * A255756 A255757 A255758

Keyword

nonn

Author

R. H. Hardin, Mar 05 2015

Status

approved