A011997 Number of (n,3,7) difference families over Z_n.

8, 0, 27, 0, 0, 0, 20347, 0

Offset

7,1

References

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

Links

Table of n, a(n) for n=7..14.

Crossrefs

Sequence in context: A337550 A088663 A291681 * A187162 A197618 A340953

Adjacent sequences: A011994 A011995 A011996 * A011998 A011999 A012000

Keyword

nonn,hard

Author

N. J. A. Sloane.

Status

approved