A302462 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 3, 55, 10, 233, 123, 1518, 2945, 16711, 58462, 256863, 1039347, 4337252, 17926079, 74303683, 307706930, 1274892369, 5281342547, 21882023418, 90662172089, 375642965369, 1556440391546, 6448902902619, 26720451492533, 110713137717160

Offset

1,1

Comments

Row 4 of A302460.

Links

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

R. H. Hardin, Empirical recurrence of order 71

Formula

Empirical recurrence of order 71 (see link above)

Example

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

Crossrefs

Cf. A302460.

Sequence in context: A286034 A256046 A197245 * A303244 A038281 A302370

Adjacent sequences: A302459 A302460 A302461 * A302463 A302464 A302465

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved