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A202044 Number of zero-sum nX5 -1..1 arrays with every element unequal to at most two horizontal and vertical neighbors 1
51, 1593, 19541, 359017, 6221993, 119412837, 2229078023, 43322352587, 834780981463, 16419276700137, 322292535850539, 6395286541286533, 126942458619056105, 2535214795070175713, 50692230117983107173 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A202047
LINKS
EXAMPLE
Some solutions for n=3
.-1..0..0..0..1...-1.-1..1.-1.-1....1..1..0..0..1...-1..1.-1.-1.-1
..1..1..1..0..0....1..1..1..0..0...-1.-1.-1..0..0...-1..1..1..1..1
.-1.-1..1.-1.-1....1..0..0..0.-1....1..1.-1..0.-1....1..1.-1.-1..0
CROSSREFS
Sequence in context: A231648 A017767 A017714 * A238319 A014943 A278623
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 10 2011
STATUS
approved

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Last modified July 19 00:30 EDT 2024. Contains 374388 sequences. (Running on oeis4.)