A297505 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

37, 2097, 34757, 1247716, 35049871, 978288822, 28914051279, 823340493402, 23748019543354, 684563956136832, 19685697905900807, 567106229569054219, 16326031115140984900, 470031756510991757935, 13533758185630160222532

Offset

1,1

Comments

Column 7 of A297506.

Links

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

Example

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

Crossrefs

Cf. A297506.

Sequence in context: A371489 A025762 A297313 * A099807 A193123 A295846

Adjacent sequences: A297502 A297503 A297504 * A297506 A297507 A297508

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved