A251054 Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements

29759, 118925, 237143, 533327, 1045337, 2129846, 4118693, 8207451, 16293926, 33460774, 69949629, 150556699, 329921966, 735973997, 1659208781, 3772267028, 8617309611, 19752084140, 45358074700, 104286805752, 239930547292

Offset

1,1

Comments

Column 7 of A251055

Links

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

Formula

Empirical: a(n) = 8*a(n-1) -25*a(n-2) +35*a(n-3) -7*a(n-4) -49*a(n-5) +77*a(n-6) -55*a(n-7) +20*a(n-8) -3*a(n-9) for n>12

Example

Some solutions for n=2
..2..2..3..3..3..3..3..3....2..0..1..0..3..0..1..2....1..0..1..0..0..1..1..2
..0..0..0..0..0..0..0..0....2..0..1..0..3..0..0..1....2..0..1..0..0..0..0..1
..3..3..3..3..1..1..0..0....3..0..1..0..3..0..0..0....2..0..1..0..0..0..0..0

Crossrefs

Sequence in context: A228544 A206203 A204283 * A206070 A056747 A157614

Adjacent sequences: A251051 A251052 A251053 * A251055 A251056 A251057

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved