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A301487 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
8, 50, 148, 599, 2354, 9415, 38558, 158994, 657238, 2721509, 11274883, 46736042, 193836729, 804279754, 3338261393, 13859019181, 57545314726, 238962743161, 992381007429, 4121406272689, 17116902820124, 71090859437426 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A301491.

LINKS

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

R. H. Hardin, Empirical recurrence of order 89

FORMULA

Empirical recurrence of order 89 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301491.

Sequence in context: A300494 A300933 A300877 * A299686 A133426 A212063

Adjacent sequences:  A301484 A301485 A301486 * A301488 A301489 A301490

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2018

STATUS

approved

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Last modified May 26 17:17 EDT 2019. Contains 323597 sequences. (Running on oeis4.)