A201495 Number of nX7 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing

24, 151593, 3127432827, 68110029402413, 1219998885223727883

Offset

1,1

Comments

Column 7 of A201496

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A294318 A061527 A210278 * A258924 A179268 A056947

Adjacent sequences: A201492 A201493 A201494 * A201496 A201497 A201498

Keyword

nonn

Author

R. H. Hardin Dec 02 2011

Status

approved