A011993 - OEIS

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A011993

(2n+1,3,3) difference families over Z_{2n+1}.

0

1, 3, 4, 8, 47, 421, 1550, 13316, 212968

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

OFFSET

2,2

REFERENCES

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

LINKS

Table of n, a(n) for n=2..10.

CROSSREFS

Sequence in context: A258372 A096847 A367131 * A286125 A180169 A154714

Adjacent sequences: A011990 A011991 A011992 * A011994 A011995 A011996

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane.

STATUS

approved