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A302530 Number of 4Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
0, 23, 115, 168, 539, 1977, 5942, 16733, 49219, 159516, 493401, 1460747, 4425266, 13722727, 42140581, 127606254, 388561273, 1192422089, 3648989388, 11120119943, 33934405093, 103799531930, 317293759665, 968655453293, 2958170322080 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A302528.

LINKS

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

R. H. Hardin, Empirical recurrence of order 68

FORMULA

Empirical recurrence of order 68 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A302528.

Sequence in context: A070024 A111943 A057877 * A156568 A042026 A042028

Adjacent sequences:  A302527 A302528 A302529 * A302531 A302532 A302533

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 2018

STATUS

approved

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Last modified January 22 19:28 EST 2022. Contains 350492 sequences. (Running on oeis4.)