A256897 Number of (n+2)X(1+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, 2444, 9374, 34698, 113474, 330684, 914320, 2433544, 6176662, 15093057, 35958908, 83879816, 191591614, 430057344, 952623906, 2086634822, 4522903834, 9718017421, 20736059936, 43980645588, 92782630758, 194864839161

Offset

1,1

Comments

Column 1 of A256904

Links

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

R. H. Hardin, Empirical recurrence of order 68

Formula

Empirical recurrence of order 68 (see link above)

Example

Some solutions for n=4
..0..1..0....0..0..1....1..0..0....0..0..0....0..0..1....0..0..0....1..0..0
..0..0..0....0..0..1....0..0..0....0..0..1....1..1..1....1..0..0....0..1..0
..0..1..0....1..0..0....0..0..0....1..1..1....0..0..1....1..1..1....0..0..0
..0..0..0....1..0..1....0..0..1....1..1..1....1..1..1....0..1..0....1..1..1
..1..1..0....1..0..0....1..1..0....1..1..1....1..1..0....0..1..0....1..1..1
..1..0..1....1..0..0....0..1..1....1..1..1....0..1..0....1..0..1....1..0..1

Crossrefs

Cf. A256904

Sequence in context: A253834 A259006 A256904 * A255756 A254845 A254838

Adjacent sequences: A256894 A256895 A256896 * A256898 A256899 A256900

Keyword

nonn

Author

R. H. Hardin, Apr 12 2015

Status

approved