A300877 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 50, 148, 589, 2264, 8739, 34693, 138559, 556973, 2247619, 9087826, 36797650, 149145738, 604912470, 2454539244, 9962718432, 40445652520, 164218445897, 666820225171, 2707820511258, 10996313658874, 44656547438787

Offset

1,1

Comments

Column 4 of A300881.

Links

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

R. H. Hardin, Empirical recurrence of order 97

Formula

Empirical recurrence of order 97 (see link above)

Example

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

Crossrefs

Cf. A300881.

Sequence in context: A258635 A300494 A300933 * A301487 A299686 A133426

Adjacent sequences: A300874 A300875 A300876 * A300878 A300879 A300880

Keyword

nonn

Author

R. H. Hardin, Mar 14 2018

Status

approved