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A253987 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2736, 13188, 71116, 406183, 2136758, 11055001, 57285940, 292920515, 1484002479, 7476194054, 37444501224, 186551627339, 925459276687, 4573566632656, 22524344983871, 110592854608614, 541521269124949, 2645012332922518 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A253993
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..1....1..0..0..1....0..0..1..1....1..0..0..1....0..1..0..0
..1..0..0..0....1..0..0..1....1..1..0..1....1..0..0..1....0..0..0..1
..0..0..0..1....0..1..1..1....1..1..0..1....0..0..0..0....0..1..1..0
..1..0..0..0....1..1..1..1....1..1..1..1....1..0..0..1....0..1..1..0
..1..0..1..0....1..1..1..0....1..0..1..0....0..0..1..0....0..0..0..0
CROSSREFS
Sequence in context: A297726 A122473 A253994 * A258904 A221976 A337625
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 21 2015
STATUS
approved

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Last modified March 19 07:38 EDT 2024. Contains 370958 sequences. (Running on oeis4.)