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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
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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
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Last modified March 19 02:55 EDT 2024. Contains 370952 sequences. (Running on oeis4.)