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A201489 Number of n X n zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing 0

%I #6 Dec 18 2015 18:17:55

%S 1,29,9331,50432052,4585552158911,7383126698273869479

%N Number of n X n zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing

%C Diagonal of A201496

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Dec 02 2011

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Last modified July 24 13:23 EDT 2024. Contains 374584 sequences. (Running on oeis4.)