A201493 Number of nX5 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.

12, 7815, 7798656, 6697376240, 4585552158911, 2571822263246639, 1219998885223727883, 501770963443215883902, 182271590618268117246577, 59312881704712898493358018, 17484065266324835514539288191

Offset: 1

Author

R. H. Hardin Dec 02 2011

Keywords

• nonn

Comments

Column 5 of A201496

Examples

			Some solutions for n=2
.-1..0..0..1..1...-1.-1.-1..0..2...-2.-1..1..1..1...-2.-1..0..0..1
..0..0..2.-2.-1...-1..0..0..0..2...-1.-1.-2..2..2....2.-1.-1..0..2