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A293081 Number of nX2 0..1 arrays with the number of 1s horizontally or antidiagonally adjacent to some 0 two less than the number of 0s adjacent to some 1. 1
0, 0, 1, 10, 60, 304, 1420, 6312, 27167, 114412, 474563, 1947098, 7925708, 32072580, 129213082, 518818124, 2077775396, 8304424080, 33138971978, 132078954532, 525904271587, 2092410377864, 8320012474033, 33066905278394, 131371155380369 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 2 of A293087.

LINKS

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

EXAMPLE

All solutions for n=4

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

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

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

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

CROSSREFS

Cf. A293087.

Sequence in context: A004406 A003472 A112502 * A292489 A083585 A250575

Adjacent sequences:  A293078 A293079 A293080 * A293082 A293083 A293084

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 30 2017

STATUS

approved

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Last modified March 20 05:45 EDT 2019. Contains 321344 sequences. (Running on oeis4.)