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A303411 Number of 4Xn 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
0, 23, 119, 168, 547, 2079, 6322, 17903, 53665, 177334, 555813, 1667489, 5141358, 16219859, 50536643, 155427826, 481370601, 1501569819, 4667505936, 14454412939, 44845109069, 139426950850, 433097541907, 1343835090319, 4171764326604 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A303410.

LINKS

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

R. H. Hardin, Empirical recurrence of order 71

FORMULA

Empirical recurrence of order 71 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A303410.

Sequence in context: A042028 A265982 A253679 * A069756 A337751 A293565

Adjacent sequences:  A303408 A303409 A303410 * A303412 A303413 A303414

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 23 2018

STATUS

approved

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Last modified September 20 22:45 EDT 2021. Contains 347596 sequences. (Running on oeis4.)