A302414 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 361, 599, 3655, 33596, 306064, 2342685, 20184979, 170625048, 1425095842, 12008438672, 101010115716, 849123265189, 7142364165791, 60060064234249, 505098146911393, 4247807853135286, 35722407791248043, 300417586740296887

Offset

1,1

Comments

Column 7 of A302415.

Links

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

Example

Some solutions for n=5
..0..1..1..0..0..1..0. .0..0..1..0..1..1..0. .0..1..0..1..1..0..1
..0..0..0..1..1..1..0. .1..1..1..0..0..0..1. .1..0..0..1..0..0..1
..0..1..0..1..0..1..0. .1..0..1..0..1..0..1. .0..1..0..1..0..1..1
..1..1..0..1..1..1..0. .1..0..0..1..1..1..1. .0..1..0..1..0..1..0
..0..0..1..0..0..1..1. .0..0..1..0..1..0..0. .0..1..0..1..0..1..0

Crossrefs

Cf. A302415.

Sequence in context: A137739 A281468 A302622 * A303181 A017486 A344302

Adjacent sequences: A302411 A302412 A302413 * A302415 A302416 A302417

Keyword

nonn

Author

R. H. Hardin, Apr 07 2018

Status

approved