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A302822 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
8, 81, 389, 1494, 6905, 34957, 170262, 800847, 3803935, 18365102, 88560473, 424619869, 2035343158, 9777295419, 46988945099, 225666735042, 1083506611767, 5203510168649, 24992947298934, 120035845319593, 576475476282345 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A302820.

LINKS

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

R. H. Hardin, Empirical recurrence of order 67

FORMULA

Empirical recurrence of order 67 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A302820.

Sequence in context: A302325 A303018 A247536 * A303515 A027768 A236749

Adjacent sequences:  A302819 A302820 A302821 * A302823 A302824 A302825

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 13 2018

STATUS

approved

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Last modified November 27 09:19 EST 2021. Contains 349365 sequences. (Running on oeis4.)