A255795 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 3

134, 166, 178, 262, 340, 472, 600, 856, 1172, 1713, 2474, 3613, 5136, 7550, 10830, 15905, 23000, 33843, 48844, 71957, 103968, 153034, 221354, 325990, 471376, 694357, 1004198, 1478884, 2139108, 3150602, 4556872, 6711922, 9708068, 14298527

Offset

1,1

Comments

Column 2 of A255801

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = a(n-2) +a(n-4) +5*a(n-6) -2*a(n-8) -2*a(n-10) -7*a(n-12) +a(n-14) +a(n-16) +3*a(n-18) for n>22

Example

Some solutions for n=4
..1..0..0..1....1..0..0..1....0..0..1..1....0..1..1..1....0..0..1..1
..1..1..1..0....0..1..1..0....1..0..1..0....1..0..1..0....0..1..0..1
..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..0....1..0..1..0
..1..0..1..1....1..0..1..1....1..0..1..0....1..1..0..0....0..1..0..1
..0..1..0..0....0..1..0..0....0..1..0..1....0..0..1..1....1..0..1..0
..1..0..1..0....1..0..1..0....1..1..0..0....1..0..1..0....1..1..0..0

Crossrefs

Cf. A255801

Sequence in context: A061491 A274132 A252133 * A048128 A047824 A020353

Adjacent sequences: A255792 A255793 A255794 * A255796 A255797 A255798

Keyword

nonn

Author

R. H. Hardin, Mar 06 2015

Status

approved