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A254812 Number of (n+2) X (n+2) 0..1 arrays with every 3 X 3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically. 0
512, 15848, 748444, 52855290, 5252066348, 913402797416, 217878991008870, 84913090550322584, 49469250115481261672 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A254819.
LINKS
EXAMPLE
Some solutions for n=2
..0..1..0..1....0..0..0..0....0..1..0..0....0..0..1..1....0..1..0..0
..1..1..0..0....1..0..1..0....0..0..1..0....0..1..0..1....0..0..0..0
..0..1..0..1....0..0..1..1....0..1..1..0....0..1..1..1....0..0..0..0
..0..1..1..1....0..1..1..1....1..0..1..1....0..0..1..0....0..1..1..1
CROSSREFS
Cf. A254819.
Sequence in context: A254720 A254252 A200791 * A329894 A258523 A257147
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2015
STATUS
approved

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)