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A253319 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw 0
16, 126, 1217, 7744, 58505, 283804, 1660088, 6753250, 32941939, 123940122, 544975707, 2033911736, 8556436417, 32990467558, 137911795230 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A253326
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..1....0..1..0..0..0....0..0..0..0..0....0..0..0..0..0
..1..0..1..0..0....0..0..0..1..1....0..0..0..0..0....0..0..0..1..0
..0..0..0..0..1....0..1..0..1..0....1..0..1..0..1....1..0..1..0..1
..0..1..0..1..1....1..0..1..1..1....1..0..1..0..1....0..1..0..1..1
..0..1..1..1..1....0..1..1..0..1....0..1..1..1..1....1..0..1..1..0
CROSSREFS
Sequence in context: A067470 A133111 A268998 * A367070 A291460 A004017
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2014
STATUS
approved

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)