A297761 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s.

1, 733, 24801, 759243, 45618455, 2301783905, 108229776807, 5394743533114, 267870723932943, 13164280362488109, 649645311987327236, 32083173143952274627, 1582748891993544903545, 78096927219843019316942

Offset

1,2

Comments

Column 7 of A297762.

Links

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

Example

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

Crossrefs

Cf. A297762.

Sequence in context: A180919 A166607 A346024 * A220625 A260035 A033529

Adjacent sequences: A297758 A297759 A297760 * A297762 A297763 A297764

Keyword

nonn

Author

R. H. Hardin, Jan 05 2018

Status

approved