A255762 Number of (7+2)X(n+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, 290525, 145536, 306248, 300504, 733081, 739776, 1603012, 1998480, 4087836, 5951488, 11586092, 18011344, 33446520, 52638248, 91911020, 141968656, 236249776, 355847440, 566125804, 828298440, 1272368584, 1814128584

Offset

1,1

Comments

Row 7 of A255756

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..1..0....0..1..0....0..1..0....0..0..0....0..1..0....0..0..0....0..0..0
..0..0..1....1..0..0....1..0..0....1..0..1....1..0..1....1..0..0....1..0..1
..1..1..0....0..0..1....0..1..1....1..1..1....1..1..1....1..1..0....1..1..1
..1..0..0....1..1..0....0..1..0....1..1..0....0..1..1....1..1..0....0..1..1
..0..1..1....0..0..0....0..1..0....0..1..1....0..1..1....1..0..0....0..1..1
..1..0..0....1..1..0....1..1..0....0..0..0....1..0..0....0..1..1....0..1..1
..1..0..0....1..0..0....0..0..1....0..1..1....1..0..0....1..1..0....0..0..0
..0..0..0....0..0..0....1..0..0....1..0..0....1..0..0....0..0..1....0..0..1
..1..1..1....1..1..0....1..0..1....1..0..0....0..0..0....1..1..1....0..0..1

Crossrefs

Cf. A255756

Sequence in context: A237895 A187295 A234244 * A255755 A254844 A259304

Adjacent sequences: A255759 A255760 A255761 * A255763 A255764 A255765

Keyword

nonn

Author

R. H. Hardin, Mar 05 2015

Status

approved