A297724 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.

1, 280, 4090, 34319, 512354, 8103241, 107787351, 1446088760, 20410564866, 284834549399, 3925719705949, 54393595038381, 755754672219017, 10479694450894966, 145249271559341180, 2014480587809008069

Offset

1,2

Comments

Row 5 of A297720.

Links

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

Example

Some solutions for n=4
..0..1..1..0. .0..0..1..1. .1..1..0..0. .0..0..1..1. .0..0..0..0
..0..0..0..1. .0..0..0..0. .1..0..0..0. .0..0..0..1. .0..0..0..1
..0..0..0..0. .1..1..1..1. .1..0..1..1. .0..1..0..0. .1..1..1..1
..0..0..0..0. .0..1..0..1. .0..1..0..0. .0..1..1..1. .0..1..0..0
..0..0..1..1. .1..1..1..1. .1..1..1..0. .1..0..0..1. .1..0..1..1

Crossrefs

Cf. A297720.

Sequence in context: A297510 A327948 A187384 * A024214 A357248 A094895

Adjacent sequences: A297721 A297722 A297723 * A297725 A297726 A297727

Keyword

nonn

Author

R. H. Hardin, Jan 04 2018

Status

approved