A257182 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 10925, 252288, 12941212, 1168362160, 209357338632, 70497822050321, 41481946444109537, 45886972050838654878, 93050783565680083134452

Offset

1,1

Comments

Diagonal of A257189

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A257189

Sequence in context: A254797 A254837 A254560 * A288776 A200844 A254475

Adjacent sequences: A257179 A257180 A257181 * A257183 A257184 A257185

Keyword

nonn

Author

R. H. Hardin, Apr 17 2015

Status

approved