A302152 - OEIS

A302152

Number of 4 X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

8, 1, 10, 17, 56, 255, 1038, 4771, 21866, 102060, 476499, 2227609, 10440370, 48996354, 230159202, 1081764728, 5086004704, 23916740145, 112479869517, 529026120838, 2488273643127, 11703911410284, 55051772837784

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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 A348973

Adjacent sequences: A302149 A302150 A302151 * A302153 A302154 A302155

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 02 2018

STATUS

approved