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A284218 Number of n X 4 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
6, 44, 499, 6511, 91260, 1317770, 19371893, 288303232, 4330336770, 65507133232, 996599090507, 15232184395483, 233708530421124, 3597476814925298, 55530194727444557, 859222993580853779, 13322830756899018309 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A284222.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A284222.

Sequence in context: A124996 A226045 A001852 * A295978 A194928 A267074

Adjacent sequences:  A284215 A284216 A284217 * A284219 A284220 A284221

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 23 2017

STATUS

approved

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Last modified November 24 04:08 EST 2020. Contains 338607 sequences. (Running on oeis4.)