A302952 Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 2208, 185810, 17374552, 1596912288, 147310312318, 13578993819785, 1251888966185979, 115412264434282781, 10639969409929461395, 980908241510917291141, 90430818798138269376877, 8336898786544158131204437

Offset

1,1

Comments

Column 7 of A302953.

Links

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

Example

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

Crossrefs

Cf. A302953.

Sequence in context: A046246 A302380 A303101 * A151580 A173175 A268150

Adjacent sequences: A302949 A302950 A302951 * A302953 A302954 A302955

Keyword

nonn

Author

R. H. Hardin, Apr 16 2018

Status

approved