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A256744 Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0 1
2065, 2512, 3752, 5888, 10360, 18688, 33616, 61568, 112928, 209024, 394816, 732800, 1397888, 2665088, 5068544, 9757312, 18928128, 36301440, 71073280, 138021504, 269741056, 527544960, 1039244800, 2031272576, 4023613440, 7901280896 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A256748
LINKS
FORMULA
Empirical: a(n) = 7*a(n-2) +8*a(n-3) -14*a(n-4) -52*a(n-5) -8*a(n-6) +88*a(n-7) +96*a(n-8) -32*a(n-9) -128*a(n-10) for n>14
EXAMPLE
Some solutions for n=4
..1..1..0..1..1..1....0..1..0..1..0..0....0..1..1..0..0..1....0..1..0..0..1..0
..1..0..1..0..0..1....0..1..0..1..0..1....1..0..0..1..1..1....1..1..0..0..1..1
..0..0..1..0..0..1....1..1..1..1..1..1....0..1..1..0..0..1....1..1..1..1..1..1
..1..1..1..1..1..1....1..0..1..0..1..0....1..0..0..1..1..1....0..1..0..0..1..0
..0..0..1..0..0..1....0..0..1..0..1..0....0..1..1..0..0..1....0..1..0..0..1..0
..0..0..1..0..1..0....0..1..0..1..0..1....1..0..0..1..1..0....1..0..1..1..1..1
CROSSREFS
Sequence in context: A204314 A204310 A168432 * A015993 A065217 A249288
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 09 2015
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)