A011991 (n,3,1) difference families over Z_n.

1, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 4, 0, 7, 0, 0, 0, 12, 0, 8, 0, 0, 0, 80, 0, 84, 0, 0, 0, 820, 0, 798, 0, 0, 0, 9508, 0, 11616, 0, 0, 0, 157340, 0, 139828, 0, 0, 0, 3027456, 0, 2353310

Offset

7,9

References

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

Links

Table of n, a(n) for n=7..57.

Crossrefs

Sequence in context: A348613 A285182 A190608 * A234931 A129183 A374255

Adjacent sequences: A011988 A011989 A011990 * A011992 A011993 A011994

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved