A269898 Number of nX4 0..6 arrays with some element plus some horizontally or vertically adjacent neighbor totalling six exactly once.

756, 2005080, 2801265390, 3263186052840, 3482459146452300, 3529041005211929340, 3455975332370347120110, 3303146124421034482402560, 3100239092232761916959997090, 2869073024662771484873107165380

Offset

1,1

Comments

Column 4 of A269902.

Links

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

Formula

Empirical: a(n) = 1746*a(n-1) -838311*a(n-2) +67282834*a(n-3) -2128326885*a(n-4) +29556635268*a(n-5) -150523824676*a(n-6) for n>7

Example

Some solutions for n=1
..4..5..1..0. .0..0..0..6. .3..3..5..6. .2..3..3..6. .0..2..3..3

Crossrefs

Cf. A269902.

Sequence in context: A269286 A289570 A269934 * A291864 A173507 A101833

Adjacent sequences: A269895 A269896 A269897 * A269899 A269900 A269901

Keyword

nonn

Author

R. H. Hardin, Mar 07 2016

Status

approved