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 A201887 Number of zero-sum nX4 -2..2 arrays with every element equal to at least one horizontal or vertical neighbor 0

%I

%S 5,413,26003,2171313,184247585,16910703303,1591685181703,

%T 153167112074177,14927625333671307,1468389415886159993

%N Number of zero-sum nX4 -2..2 arrays with every element equal to at least one horizontal or vertical neighbor

%C Column 4 of A201888

%e Some solutions for n=3

%e ..2..2.-2..1....2..0.-2.-2....1..1.-1.-1....2.-1.-2.-2....2.-1.-1..2

%e .-1..0.-2..1....2..0..1..1....1.-2..2.-1....2.-1..1.-2....2.-1.-1..2

%e .-1..0..0..0...-1.-1..0..0...-2.-2..2..2....2..2..1.-2...-1.-1.-1.-1

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 06 2011

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Last modified November 30 08:28 EST 2022. Contains 358438 sequences. (Running on oeis4.)