A295269 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1's.

2, 11, 164, 6659, 748740, 230659662, 196091375073, 458510348625561, 2951683183977839155, 52303382279027148884728, 2551191530898428081696382880, 342537007989863347885673784022387

Offset

1,1

Comments

Diagonal of A295275.

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Cf. A295275.

Sequence in context: A318173 A349639 A067968 * A197336 A013050 A051255

Adjacent sequences: A295266 A295267 A295268 * A295270 A295271 A295272

Keyword

nonn

Author

R. H. Hardin, Nov 19 2017

Status

approved