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A124119 Number of nonisomorphic Steiner quadruple systems (SQS's) S(3,4,v) on v = 6n+2 or 6n+4 points. 4
1, 1, 4, 1054163 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
A051390 is the official version of this sequence and has all the references etc.
LINKS
Eric Weisstein's World of Mathematics, Steiner Quadruple System
EXAMPLE
There are 4 nonisomorphic SQS's on 14 points.
CROSSREFS
Sequence in context: A058430 A079286 A275685 * A090096 A218484 A046362
KEYWORD
nonn,hard,more
AUTHOR
N. J. A. Sloane, Nov 30 2006
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)