A011992 (n,3,2) difference families over Z_n.

2, 0, 0, 0, 0, 4, 9, 0, 9, 71, 0, 0, 201, 0, 175, 0, 0, 2939, 19543, 0, 10841, 609483

Offset

7,1

References

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

Links

Table of n, a(n) for n=7..28.

Crossrefs

Sequence in context: A028617 A261470 A006792 * A318329 A107503 A350731

Adjacent sequences: A011989 A011990 A011991 * A011993 A011994 A011995

Keyword

nonn,hard

Author

N. J. A. Sloane

Status

approved