A225998 Number of pairs of orthogonal (-5,6) vectors of length 11*n.

22176, 335386827776, 849096326082723840, 3382498893919837995663360, 12525301776918401256778352295936, 47806396948285999641998907781626724352, 186570872745316137212860850541663493543690240

Offset

1,1

Comments

Row 12 of A225987.

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

Some solutions for n=1
.-5..6...-5..6....6..6...-5..6....6..6...-5..6....6..6...-5..6...-5..6...-5.-5
..6.-5....6..6...-5..6....6..6...-5..6....6..6....6..6...-5..6...-5..6...-5.-5
..6..6....6..6....6.-5....6..6....6..6....6..6...-5..6...-5..6....6..6...-5.-5
..6.-5....6.-5....6..6....6..6...-5..6....6.-5....6.-5....6..6....6..6...-5..6
..6.-5....6.-5....6.-5....6.-5....6.-5....6..6....6..6....6.-5....6.-5...-5.-5
..6..6....6..6....6.-5....6.-5....6.-5....6..6....6.-5....6..6...-5..6...-5.-5
..6..6....6..6....6..6....6.-5....6.-5....6.-5....6.-5....6.-5....6.-5...-5.-5
..6..6...-5..6....6..6....6..6....6..6...-5..6....6..6....6..6....6..6...-5..6
..6..6...-5..6....6.-5...-5..6....6..6...-5..6...-5..6....6..6....6..6....6.-5
.-5..6...-5..6....6.-5...-5..6....6.-5....6..6....6..6...-5..6....6..6...-5..6
..6.-5....6..6....6..6....6..6....6..6...-5..6...-5..6....6..6....6.-5....6.-5

Crossrefs

Sequence in context: A043815 A157622 A225392 * A209396 A210295 A060109

Adjacent sequences: A225995 A225996 A225997 * A225999 A226000 A226001

Keyword

nonn

Author

R. H. Hardin, May 22 2013

Status

approved