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A011999 (2n+1,3,9) difference families over Z_{2n+1}. +0
1
1, 12, 108, 2593, 225900 (list; graph; listen)
OFFSET

2,2
REFERENCES

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

CROSSREFS

Sequence in context: A140317 A069653 A138432 this_sequence A128877 A085797 A016161

Adjacent sequences: A011996 A011997 A011998 this_sequence A012000 A012001 A012002

KEYWORD

nonn,hard

AUTHOR

njas

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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