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A011997
Number of (n,3,7) difference families over Z_n.
0
8, 0, 27, 0, 0, 0, 20347, 0
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OFFSET
7,1
REFERENCES
CRC Handbook of Combinatorial Designs, 1996, p. 285.
LINKS
Table of n, a(n) for n=7..14.
CROSSREFS
Sequence in context:
A337550
A088663
A291681
*
A187162
A197618
A340953
Adjacent sequences:
A011994
A011995
A011996
*
A011998
A011999
A012000
KEYWORD
nonn
,
hard
AUTHOR
N. J. A. Sloane
.
STATUS
approved
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Last modified September 3 01:06 EDT 2024. Contains 375630 sequences. (Running on oeis4.)