A011994 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A011994

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

0

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

(list; graph; refs; listen; history; text; internal format)

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