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A256897 Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally and vertically 2
512, 2444, 9374, 34698, 113474, 330684, 914320, 2433544, 6176662, 15093057, 35958908, 83879816, 191591614, 430057344, 952623906, 2086634822, 4522903834, 9718017421, 20736059936, 43980645588, 92782630758, 194864839161 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A256904
LINKS
FORMULA
Empirical recurrence of order 68 (see link above)
EXAMPLE
Some solutions for n=4
..0..1..0....0..0..1....1..0..0....0..0..0....0..0..1....0..0..0....1..0..0
..0..0..0....0..0..1....0..0..0....0..0..1....1..1..1....1..0..0....0..1..0
..0..1..0....1..0..0....0..0..0....1..1..1....0..0..1....1..1..1....0..0..0
..0..0..0....1..0..1....0..0..1....1..1..1....1..1..1....0..1..0....1..1..1
..1..1..0....1..0..0....1..1..0....1..1..1....1..1..0....0..1..0....1..1..1
..1..0..1....1..0..0....0..1..1....1..1..1....0..1..0....1..0..1....1..0..1
CROSSREFS
Sequence in context: A253834 A259006 A256904 * A255756 A254845 A254838
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 12 2015
STATUS
approved

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Last modified July 20 05:30 EDT 2024. Contains 374441 sequences. (Running on oeis4.)