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A258518 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two sums of the central column and central row nondecreasing horizontally and vertically 1
512, 7334, 19920, 18282, 4028, 1256, 520, 424, 312, 252, 228, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192, 188, 176, 188, 192, 188, 192, 172, 192, 188, 192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A258522

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..68

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A258522

Sequence in context: A017487 A263034 A254012 * A222775 A257419 A255749

Adjacent sequences:  A258515 A258516 A258517 * A258519 A258520 A258521

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 01 2015

STATUS

approved

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Last modified May 12 04:27 EDT 2021. Contains 343810 sequences. (Running on oeis4.)