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A254021 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2540, 7212, 23295, 81959, 261188, 806538, 2368198, 6624259, 17894542, 46475759, 117362361, 289972349, 700430787, 1660287016, 3874041941, 8916784297, 20277482009, 45635984351, 101763767073, 225107832296, 494489541033 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 2 of A254020
LINKS
EXAMPLE
Some solutions for n=4
..1..1..0..0..1..1....1..0..0..1..0..0....0..1..1..1..1..1....0..1..1..0..0..1
..0..1..0..1..0..1....1..0..1..1..0..1....1..0..0..1..1..1....1..1..1..0..1..1
..0..1..0..1..0..1....1..0..1..0..0..1....0..0..1..1..0..0....0..0..0..0..1..0
..0..1..1..0..0..1....0..1..1..0..1..1....0..1..1..1..1..1....0..0..1..1..1..1
CROSSREFS
Sequence in context: A172142 A206596 A334932 * A254014 A254888 A248997
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2015
STATUS
approved

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Last modified May 26 04:31 EDT 2024. Contains 372807 sequences. (Running on oeis4.)