A256896 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally and vertically

512, 9072, 202462, 2212280, 7212370, 20148566, 20860406, 59078346, 184212024, 632179718, 2314423502, 8727557690, 33524570530, 130212627960, 509112768360, 1998206331062, 7859885695566, 30956159700748, 122020341570654

Offset

1,1

Comments

Diagonal of A256904

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for n=2
..0..1..1..0....0..1..0..0....0..1..0..1....1..1..1..1....1..0..1..0
..0..0..0..1....0..1..1..1....0..0..0..1....1..0..0..0....1..0..1..1
..0..0..0..1....0..1..1..1....0..0..0..0....0..0..1..1....1..1..1..1
..0..0..1..1....1..0..0..1....0..1..0..0....1..1..1..1....1..1..0..1

Crossrefs

Cf. A256904

Sequence in context: A017619 A253928 A254887 * A254234 A254546 A255028

Adjacent sequences: A256893 A256894 A256895 * A256897 A256898 A256899

Keyword

nonn

Author

R. H. Hardin, Apr 12 2015

Status

approved