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A257429 Number of (4+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
41140, 119393, 449022, 1770206, 5985744, 19771628, 64652177, 195603505, 586920722, 1743331948, 5079106522, 14663485366, 42004087573, 119219661191, 336143582507, 942853480005, 2631756218200, 7318423088042, 20289444965118 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A257426
LINKS
EXAMPLE
Some solutions for n=2
..0..0..0..0....1..0..1..0....0..0..1..1....0..0..1..1....0..1..0..0
..0..0..0..1....0..0..0..1....0..0..1..1....0..0..0..1....0..1..1..0
..1..1..1..1....0..1..0..1....0..0..1..0....0..1..0..0....0..1..0..0
..1..0..0..0....0..1..0..1....0..0..1..0....1..0..0..1....0..1..1..1
..1..0..0..0....0..1..0..0....1..0..1..0....0..1..1..1....0..1..1..0
..1..1..0..1....0..0..1..1....1..1..1..1....0..1..1..1....0..1..1..0
CROSSREFS
Sequence in context: A234546 A344456 A257422 * A254238 A286891 A183667
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 22 2015
STATUS
approved

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Last modified March 28 16:00 EDT 2024. Contains 371254 sequences. (Running on oeis4.)