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A284216 Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. 1
2, 6, 19, 62, 212, 751, 2719, 10002, 37258, 140108, 530646, 2021127, 7733421, 29702087, 114438213, 442099674, 1711885120, 6642102554, 25817134600, 100506778916, 391827603432, 1529486575678, 5977159139018, 23382840951503 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A284222.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A284222.

Sequence in context: A026012 A191993 A120900 * A059712 A059713 A109262

Adjacent sequences:  A284213 A284214 A284215 * A284217 A284218 A284219

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 23 2017

STATUS

approved

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Last modified October 28 17:59 EDT 2021. Contains 348329 sequences. (Running on oeis4.)