A293096 Number of n X 4 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 42, 567, 8088, 115870, 1710994, 25504769, 383909610, 5821195059, 88774881168, 1360012227225, 20913114635864, 322580968736023, 4988786216140076, 77325995176393118, 1200887079044838246, 18681923365562958635

Offset

1,2

Comments

Column 4 of A293100.

Links

R. H. Hardin, Table of n, a(n) for n = 1..162

Example

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

Crossrefs

Cf. A293100.

Sequence in context: A248448 A248449 A245874 * A279888 A104901 A091962

Adjacent sequences: A293093 A293094 A293095 * A293097 A293098 A293099

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved