A297430 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s.

1, 73, 301, 1057, 12005, 76692, 431723, 3338387, 23694911, 160290601, 1169727060, 8508584171, 61149185363, 447149103717, 3281694474016, 24037530274436, 176807186467726, 1303136084563758, 9604835986239513, 70874413268008409

Offset

1,2

Comments

Column 7 of A297431.

Links

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

R. H. Hardin, Empirical recurrence of order 81

Formula

Empirical recurrence of order 81 (see link above)

Example

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

Crossrefs

Cf. A297431.

Sequence in context: A174334 A142614 A158744 * A142406 A005108 A142810

Adjacent sequences: A297427 A297428 A297429 * A297431 A297432 A297433

Keyword

nonn

Author

R. H. Hardin, Dec 30 2017

Status

approved