A295410 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1's.

1, 10, 234, 19026, 5741797, 6093564449, 23025368248778, 309978055996363953, 14848281990251202621848, 2531566579339095935434773023, 1536279445900820560553369496441851

Offset

1,2

Comments

Diagonal of A295416.

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..1. .1..0..0..0..0
..1..1..1..0..0. .0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..0
..0..1..0..1..0. .1..1..0..1..0. .1..1..1..0..0. .0..1..0..0..0
..0..1..0..1..1. .1..0..0..1..0. .0..1..1..0..0. .0..1..0..1..1

Crossrefs

Cf. A295416.

Sequence in context: A087434 A297648 A012240 * A188679 A167867 A268080

Adjacent sequences: A295407 A295408 A295409 * A295411 A295412 A295413

Keyword

nonn

Author

R. H. Hardin, Nov 22 2017

Status

approved