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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
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
Sequence in context: A017487 A263034 A254012 * A222775 A257419 A255749
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 01 2015
STATUS
approved

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Last modified August 12 16:47 EDT 2024. Contains 375113 sequences. (Running on oeis4.)