A297523 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.

1, 55, 727, 3383, 19187, 193087, 1671315, 11283382, 81257447, 657369214, 5147569469, 38210138908, 288167354609, 2227166744932, 17081986727547, 129544373848971, 986096515060524, 7545134870681164, 57628191903916501

Offset

1,2

Comments

Row 5 of A297519.

Links

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

R. H. Hardin, Empirical recurrence of order 87

Formula

Empirical recurrence of order 87 (see link above)

Example

Some solutions for n=6
..0..0..1..0..0..0. .0..0..0..0..1..0. .0..1..1..0..0..1. .0..0..1..0..0..0
..0..1..1..0..0..0. .0..1..0..1..0..0. .1..0..1..0..1..0. .0..0..1..1..0..0
..1..0..0..0..0..0. .0..0..1..0..1..0. .0..0..1..0..0..0. .0..0..0..0..1..0
..0..0..1..0..1..0. .0..0..0..1..0..1. .1..1..0..0..0..0. .1..0..0..0..0..0
..1..1..1..0..0..1. .0..0..1..0..0..0. .1..0..0..0..0..0. .0..1..0..1..1..0

Crossrefs

Cf. A297519.

Sequence in context: A173377 A053138 A027784 * A221786 A358634 A241634

Adjacent sequences: A297520 A297521 A297522 * A297524 A297525 A297526

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved