A011994 (n,3,4) difference families over Z_n.

2, 4, 0, 3, 21, 0, 180, 253, 0, 2981, 21742, 0, 320760

Offset

6,1

References

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

Links

Table of n, a(n) for n=6..18.

Crossrefs

Sequence in context: A198543 A367468 A294846 * A258773 A054003 A338475

Adjacent sequences: A011991 A011992 A011993 * A011995 A011996 A011997

Keyword

nonn,hard

Author

N. J. A. Sloane.

Status

approved