A011999 (2n+1,3,9) difference families over Z_{2n+1}.

1, 12, 108, 2593, 225900

Offset

2,2

References

CRC Handbook of Combinatorial Designs, 1996, p. 285.

Links

Table of n, a(n) for n=2..6.

Crossrefs

Sequence in context: A225779 A289291 A138432 * A128877 A085797 A016161

Adjacent sequences: A011996 A011997 A011998 * A012000 A012001 A012002

Keyword

nonn,hard

Author

N. J. A. Sloane.

Status

approved