A269828 Number of nX7 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.

30720, 55265336, 65284613232, 71730749075588, 74936429415811576, 75641344262475714972, 74703200829032822656704, 72410184537396417428483772, 69247970979790014999193560760, 65469795278283248240466444354336

Offset

1,1

Comments

Column 7 of A269829.

Links

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

Example

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

Crossrefs

Cf. A269829.

Sequence in context: A237636 A236126 A236944 * A270057 A236899 A258891

Adjacent sequences: A269825 A269826 A269827 * A269829 A269830 A269831

Keyword

nonn

Author

R. H. Hardin, Mar 05 2016

Status

approved