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A253833 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
512, 6339, 52014, 284109, 156876, 295098, 262418, 218499, 347440, 571191, 845552, 1524398, 2858410, 5021094, 9662090, 18996817, 36633058, 72806768, 145731460, 290387182, 583234472, 1173787454, 2359763404, 4752830758, 9577047474 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A253841
LINKS
EXAMPLE
Some solutions for n=3
..0..1..1..1..0....0..1..1..0..0....1..1..1..0..1....0..0..0..0..0
..0..0..0..0..1....1..0..1..1..1....0..0..1..0..1....1..0..0..0..1
..0..1..1..0..1....0..0..0..0..0....0..0..1..0..0....0..0..0..0..1
..0..0..1..1..1....0..1..1..1..0....1..1..1..1..1....0..0..0..1..1
..1..0..1..0..0....1..1..0..0..1....1..1..0..1..1....1..1..1..1..1
CROSSREFS
Sequence in context: A017367 A254899 A258999 * A017487 A263034 A254012
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2015
STATUS
approved

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Last modified July 18 16:59 EDT 2024. Contains 374388 sequences. (Running on oeis4.)