A255754 Number of (n+2)X(6+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

293012, 386060, 341801, 371616, 360501, 473630, 733081, 1166662, 1720217, 3169356, 6568657, 12211026, 19689657, 40611648, 92377017, 178040632, 292586745, 618865560, 1437213809, 2789956224, 4602903185, 9790126112, 22844752297

Offset

1,1

Comments

Column 6 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) +21*a(n-4) -42*a(n-5) +21*a(n-6) -84*a(n-8) +168*a(n-9) -84*a(n-10) +64*a(n-12) -128*a(n-13) +64*a(n-14) for n>28

Example

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

Crossrefs

Cf. A255756

Sequence in context: A104328 A219318 A255761 * A254843 A318787 A158124

Adjacent sequences: A255751 A255752 A255753 * A255755 A255756 A255757

Keyword

nonn

Author

R. H. Hardin, Mar 05 2015

Status

approved