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A201844 Number of zero-sum nX5 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor 1
1, 411, 17031, 1566319, 109797321, 8964073263, 697824874477, 56238345975057, 4510071758583443, 365508148420971423, 29684298137697156807, 2422133463372341456079, 198166150735435791683617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A201847

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A187991 A090123 A055018 * A105211 A081378 A234190

Adjacent sequences:  A201841 A201842 A201843 * A201845 A201846 A201847

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 06 2011

STATUS

approved

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Last modified January 28 12:58 EST 2020. Contains 331321 sequences. (Running on oeis4.)