A318094 - OEIS

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A318094

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

1

2, 50, 220, 1563, 9193, 57744, 356786, 2215533, 13752047, 85343361, 529807380, 3288466317, 20413201710, 126710229626, 786538847475, 4882316701191, 30306289156276, 188121896133891, 1167739500871746, 7248574819342407

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A318098.

LINKS

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

R. H. Hardin, Empirical recurrence of order 72

FORMULA

Empirical recurrence of order 72 (see link above)

EXAMPLE

Some solutions for n=5

..0..1..0..0. .0..1..0..1. .0..1..0..0. .0..1..1..1. .0..1..1..0

..1..1..1..1. .1..0..0..1. .1..1..0..1. .1..0..0..0. .1..1..1..1

..0..1..1..0. .0..0..0..1. .1..1..0..1. .0..0..0..0. .1..0..0..0

..0..1..1..0. .1..1..0..0. .0..1..1..1. .0..1..0..1. .0..0..0..0

..0..1..1..0. .0..0..0..1. .0..1..1..0. .1..0..0..1. .1..1..1..1

CROSSREFS

Sequence in context: A231082 A318426 A265962 * A226408 A226337 A048610

Adjacent sequences: A318091 A318092 A318093 * A318095 A318096 A318097

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 16 2018

STATUS

approved