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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 1
794128, 1323795, 1795490, 3986282, 7695684, 15676281, 29838772, 55992976, 100413564, 176175692, 297995148, 493162840, 792361276, 1249168284, 1921781524, 2908426536, 4313307192, 6311925400, 9077791868, 12909434532, 18083815180 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 7 01:07 EST 2023. Contains 360111 sequences. (Running on oeis4.)