A254844 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 and vertically

794128, 1323795, 1795490, 3986282, 7695684, 15676281, 29838772, 55992976, 100413564, 176175692, 297995148, 493162840, 792361276, 1249168284, 1921781524, 2908426536, 4313307192, 6311925400, 9077791868, 12909434532, 18083815180

Offset

1,1

Comments

Column 7 of A254845

Links

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

Formula

Empirical: a(n) = 10*a(n-1) -45*a(n-2) +120*a(n-3) -202*a(n-4) +172*a(n-5) +150*a(n-6) -840*a(n-7) +1619*a(n-8) -1846*a(n-9) +959*a(n-10) +960*a(n-11) -3000*a(n-12) +3952*a(n-13) -3352*a(n-14) +1920*a(n-15) -720*a(n-16) +160*a(n-17) -16*a(n-18) for n>53

Example

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

Crossrefs

Sequence in context: A234244 A255762 A255755 * A259304 A151561 A022203

Adjacent sequences: A254841 A254842 A254843 * A254845 A254846 A254847

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved