A258546 - OEIS

A258546

Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically

16, 112, 598, 1891, 5070, 10854, 21653, 38451, 64507, 100830, 153641, 223684, 317754, 436768, 592439, 784607, 1024843, 1313644, 1669887, 2091844, 2597102, 3185410, 3884481, 4690355, 5627875, 6695714, 7932093, 9330156, 10923242

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OFFSET

1,1

COMMENTS

Diagonal of A258554

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..69

EXAMPLE

Some solutions for n=4

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

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

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