A257155 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2848, 16677, 96680, 541896, 3009795, 16759085, 92984383, 514055240, 2836802122, 15636201632, 86098173638, 473735553644, 2605181351054, 14320528333213, 78693423907691, 432325674225100, 2374652982306556, 13041444890192024

Offset

1,1

Comments

Row 2 of A257154

Links

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

R. H. Hardin, Empirical recurrence of order 57

Formula

Empirical recurrence of order 57 (see link above)

Example

Some solutions for n=3
..1..1..1..0..0....0..0..1..1..0....1..0..1..1..0....1..0..1..0..0
..0..0..1..0..0....0..0..0..0..0....0..0..1..1..1....1..0..0..0..1
..1..0..0..1..0....0..0..0..0..0....0..1..1..1..0....0..0..0..0..0
..0..0..0..1..1....1..1..1..1..0....0..0..0..1..0....0..0..0..0..1

Crossrefs

Cf. A257154

Sequence in context: A337830 A317472 A317473 * A257148 A254737 A234416

Adjacent sequences: A257152 A257153 A257154 * A257156 A257157 A257158

Keyword

nonn

Author

R. H. Hardin, Apr 16 2015

Status

approved