A225995 Number of pairs of orthogonal (-3,5) vectors of length 8*n.

1120, 96608512, 5476370673664, 284705020569600000, 16898172507712428441600, 995986456574626692094492672, 59516704487206110046425062572032, 3603385124651416948013919241525788672

Offset

1,1

Comments

Row 9 of A225987.

Links

R. H. Hardin, Table of n, a(n) for n = 1..67

Example

Some solutions for n=1
.-3..5...-3..5...-3..5....5..5...-3..5...-3..5...-3.-3...-3..5...-3..5....5..5
..5..5....5.-3....5..5...-3..5...-3..5....5..5...-3.-3....5..5....5.-3...-3..5
..5.-3....5.-3....5.-3....5..5....5..5....5..5...-3..5...-3..5....5.-3....5.-3
..5..5...-3.-3....5..5...-3..5....5.-3....5.-3....5.-3...-3..5....5..5....5..5
.-3..5...-3.-3....5..5....5..5....5..5....5.-3...-3.-3....5..5...-3..5....5.-3
..5.-3...-3.-3....5.-3...-3..5....5.-3....5..5...-3.-3....5..5....5..5....5..5
..5.-3...-3.-3...-3..5...-3..5...-3..5....5.-3....5.-3...-3..5...-3..5....5.-3
..5..5...-3.-3...-3..5....5.-3....5..5...-3..5...-3.-3....5.-3....5..5....5.-3

Crossrefs

Sequence in context: A222695 A032779 A028464 * A122052 A207234 A207227

Adjacent sequences: A225992 A225993 A225994 * A225996 A225997 A225998

Keyword

nonn

Author

R. H. Hardin, May 22 2013

Status

approved