A300884 Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 3, 8, 40, 121, 465, 1822, 7045, 27552, 107582, 418774, 1634134, 6372604, 24848456, 96907225, 377944318, 1473935615, 5748325489, 22418429589, 87431292466, 340980199614, 1329816738811, 5186259016513, 20226307560063, 78882211351573

Offset

1,1

Comments

Column 4 of A300888.

Links

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

R. H. Hardin, Empirical recurrence of order 96

Formula

Empirical recurrence of order 96 (see link above)

Example

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

Crossrefs

Cf. A300888.

Sequence in context: A174930 A179452 A079810 * A337440 A092748 A078302

Adjacent sequences: A300881 A300882 A300883 * A300885 A300886 A300887

Keyword

nonn

Author

R. H. Hardin, Mar 14 2018

Status

approved