A300502 Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 3, 7, 20, 32, 68, 191, 504, 1353, 4033, 11685, 33861, 98728, 286160, 829255, 2405240, 6971387, 20210591, 58596872, 169882747, 492538787, 1428005265, 4140151175, 12003425671, 34801083823, 100897399130, 292528300568

Offset

1,1

Comments

Column 4 of A300506.

Links

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

R. H. Hardin, Empirical recurrence of order 93

Formula

Empirical recurrence of order 93 (see link above)

Example

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

Crossrefs

Cf. A300506.

Sequence in context: A030679 A077891 A129735 * A248257 A019663 A187488

Adjacent sequences: A300499 A300500 A300501 * A300503 A300504 A300505

Keyword

nonn

Author

R. H. Hardin, Mar 07 2018

Status

approved