A286975 - OEIS

A286975

Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 30, 538, 8270, 123706, 1853532, 27938670, 424161696, 6473516290, 99212813068, 1525788269640, 23533226594814, 363874149524074, 5638501690692214, 87539755014915366, 1361389260565705844, 21203931694258697402

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OFFSET

1,2

COMMENTS

Column 4 of A286979.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..174

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A286979.

Sequence in context: A050982 A004327 A270499 * A139626 A037961 A143399

Adjacent sequences: A286972 A286973 A286974 * A286976 A286977 A286978

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 17 2017

STATUS

approved