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A254776 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2630, 11321, 50173, 207006, 876483, 3931849, 17766805, 80755741, 371133499, 1709570292, 7888129452, 36437414874, 168400742824, 778428650323, 3598875856069, 16639899151437, 76939511613102, 355761482032982 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 2 of A254775
LINKS
FORMULA
Empirical recurrence of order 75 (see link above)
EXAMPLE
Some solutions for n=3
..0..1..0..0..1....0..1..0..1..1....0..0..0..1..0....1..1..1..0..1
..1..1..0..1..1....1..0..0..0..0....1..0..0..1..1....1..0..1..0..0
..0..0..0..1..0....0..0..1..1..1....0..0..0..1..0....1..1..1..1..1
..1..0..1..1..1....0..0..1..0..0....0..1..1..0..1....1..1..1..1..1
CROSSREFS
Sequence in context: A234698 A190936 A020439 * A254769 A254722 A236502
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 07 2015
STATUS
approved

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Last modified June 25 01:31 EDT 2024. Contains 373691 sequences. (Running on oeis4.)