A285025 Number of n X 3 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

1, 6, 97, 442, 4892, 26226, 256732, 1544872, 14082710, 91677088, 797188437, 5483647480, 46175013577, 330178554834, 2719685483708, 19987724476418, 162187667549290, 1215451639260848, 9763451129789048, 74199887341866168

Offset

1,2

Comments

Column 3 of A285030.

Links

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

Example

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

Crossrefs

Cf. A285030.

Sequence in context: A186269 A111826 A213797 * A288544 A064753 A322739

Adjacent sequences: A285022 A285023 A285024 * A285026 A285027 A285028

Keyword

nonn

Author

R. H. Hardin, Apr 08 2017

Status

approved