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A011999
(2n+1,3,9) difference families over Z_{2n+1}.
0
1, 12, 108, 2593, 225900
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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..6.
CROSSREFS
Sequence in context:
A225779
A289291
A138432
*
A128877
A085797
A016161
Adjacent sequences:
A011996
A011997
A011998
*
A012000
A012001
A012002
KEYWORD
nonn
,
hard
AUTHOR
N. J. A. Sloane
.
STATUS
approved
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Last modified September 5 19:28 EDT 2024. Contains 375700 sequences. (Running on oeis4.)