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A302152 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 1, 10, 17, 56, 255, 1038, 4771, 21866, 102060, 476499, 2227609, 10440370, 48996354, 230159202, 1081764728, 5086004704, 23916740145, 112479869517, 529026120838, 2488273643127, 11703911410284, 55051772837784 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A302150.

LINKS

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

FORMULA

Empirical recurrence of order 85 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A302150.

Sequence in context: A238271 A217430 A106627 * A160925 A345059 A099614

Adjacent sequences:  A302149 A302150 A302151 * A302153 A302154 A302155

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 02 2018

STATUS

approved

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Last modified June 25 06:20 EDT 2021. Contains 345452 sequences. (Running on oeis4.)