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A289645 Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1. 1
0, 2, 11, 44, 170, 642, 2421, 9142, 34572, 131086, 498465, 1900928, 7269978, 27879108, 107183763, 413052074, 1595247760, 6173412924, 23934713193, 92955294982, 361580812792, 1408539219596, 5494347736318, 21458645441596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A289651.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A289651.

Sequence in context: A241712 A066058 A153440 * A181369 A037744 A037625

Adjacent sequences:  A289642 A289643 A289644 * A289646 A289647 A289648

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 09 2017

STATUS

approved

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Last modified September 24 14:46 EDT 2020. Contains 337321 sequences. (Running on oeis4.)