A317867 Number of nX4 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 2, 6, 26, 88, 301, 1089, 4340, 16696, 64514, 247718, 951489, 3664952, 14093271, 54262682, 208711489, 803269846, 3090437571, 11892612119, 45759331536, 176080105486, 677526781675, 2607049617411, 10031588149594, 38600301323927

Offset

1,2

Comments

Column 4 of A317871.

Links

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

R. H. Hardin, Empirical recurrence of order 83

Formula

Empirical recurrence of order 83 (see link above)

Example

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

Crossrefs

Cf. A317871.

Sequence in context: A322116 A223094 A213339 * A092438 A240296 A027207

Adjacent sequences: A317864 A317865 A317866 * A317868 A317869 A317870

Keyword

nonn

Author

R. H. Hardin, Aug 09 2018

Status

approved