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A256746
Number of (n+2)X(6+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
12914, 12280, 16560, 18688, 47440, 72192, 155792, 255488, 600080, 869632, 2236176, 3351808, 8175376, 12600576, 31831312, 46718208, 122490640, 182095104, 471224592, 698647808, 1859822352, 2698396928, 7245722896, 10683665664
OFFSET
1,1
COMMENTS
Column 6 of A256748
LINKS
FORMULA
Empirical: a(n) = -2*a(n-1) +4*a(n-2) +24*a(n-3) +27*a(n-4) -70*a(n-5) -198*a(n-6) -88*a(n-7) +408*a(n-8) +648*a(n-9) -48*a(n-10) -896*a(n-11) -704*a(n-12) +384*a(n-13) +512*a(n-14) for n>18
EXAMPLE
Some solutions for n=4
..1..0..0..1..0..1..1..0....1..1..1..0..1..1..1..0....1..1..1..0..1..1..1..0
..1..1..1..1..0..0..1..1....0..1..0..1..0..1..0..0....0..1..0..1..0..1..0..0
..1..0..0..1..1..1..0..0....0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1
..1..1..1..1..0..0..1..1....1..0..1..0..1..0..1..0....1..0..1..0..1..0..1..0
..1..0..0..1..1..1..0..0....0..0..1..0..1..0..1..0....1..0..1..0..1..0..1..0
..1..0..1..1..0..0..1..1....1..1..1..1..1..1..0..1....1..1..0..1..0..1..1..1
CROSSREFS
Sequence in context: A185885 A212079 A162895 * A086004 A090887 A246890
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 09 2015
STATUS
approved