A297806 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 5 neighboring 1s.

1, 31, 2434, 17899, 231921, 5511367, 123361724, 2122878239, 39737434692, 798393620079, 15715764101797, 301272429965474, 5838287390984909, 114058126922015948, 2220151290688134573, 43095024081743706131

Offset

1,2

Comments

Row 6 of A297802.

Links

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

Example

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

Crossrefs

Cf. A297802.

Sequence in context: A297549 A292706 A212156 * A219076 A072019 A157696

Adjacent sequences: A297803 A297804 A297805 * A297807 A297808 A297809

Keyword

nonn

Author

R. H. Hardin, Jan 06 2018

Status

approved