A254837 Number of (n+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 and vertically

512, 10550, 131776, 701614, 2423232, 8565304, 29838772, 111752868, 415464460, 1638156932, 6343755012, 25417337372, 100688300756, 405939128228, 1625723635116, 6570557207100, 26479623649484, 107227180621124

Offset

1,1

Comments

Diagonal of A254845

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

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

Crossrefs

Sequence in context: A090007 A344305 A254797 * A254560 A257182 A288776

Adjacent sequences: A254834 A254835 A254836 * A254838 A254839 A254840

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved