A297510 Number of 5Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

1, 280, 2534, 14201, 270845, 3624914, 35049871, 431068698, 5534003000, 63359116756, 744028146659, 9066464960896, 107792105015031, 1274517673890830, 15252160661225132, 182090112172787219, 2165329133215506254

Offset

1,2

Comments

Row 5 of A297506.

Links

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

R. H. Hardin, Empirical recurrence of order 59

Formula

Empirical recurrence of order 59 (see link above)

Example

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

Crossrefs

Cf. A297506.

Sequence in context: A272982 A234458 A234452 * A327948 A187384 A297724

Adjacent sequences: A297507 A297508 A297509 * A297511 A297512 A297513

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved