A293089 Number of 3 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 1, 53, 486, 4091, 32070, 246852, 1897509, 14578434, 112390406, 867693603, 6716080364, 52061270779, 404329966577, 3144612848086, 24493415901992, 191015933608631, 1491484435347360, 11658153191250672, 91217811828544156

Offset

1,3

Comments

Row 3 of A293087.

Links

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

Example

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

Crossrefs

Cf. A293087.

Sequence in context: A261537 A142209 A322043 * A177120 A165555 A201855

Adjacent sequences: A293086 A293087 A293088 * A293090 A293091 A293092

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved