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A201799 Number of zero-sum nX4 -2..2 arrays with every element unequal to at most two horizontal and vertical neighbors 0
85, 3617, 48335, 988589, 20960485, 472565771, 10857153407, 253641348337, 5979418257253, 142075597768273, 3395164032578079, 81529069984570623, 1965470518289395959 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A201803

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=3

..0.-1..1..0...-2..1..1..0...-2.-2.-1.-1...-1..1.-2..1...-1..2.-2.-2

..0.-1..1..1...-2..1..1..1....2..2..0..0....1..1.-2..1....2..2..0..0

..0.-1..1.-1...-2..1..0..0...-1..2..0..1....0..0.-2..2...-2..0..0..1

CROSSREFS

Sequence in context: A281162 A339198 A017801 * A017748 A158796 A201796

Adjacent sequences:  A201796 A201797 A201798 * A201800 A201801 A201802

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 05 2011

STATUS

approved

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Last modified June 23 11:02 EDT 2021. Contains 345397 sequences. (Running on oeis4.)