Number of Steiner triple systems (STS's) on n elements.
A030128
Number of Steiner triple systems (STS's) on n elements.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =0a(6) =30a(7) =0a(8) =840a(9) =0a(10) =0a(11) =0a(12) =1197504000a(13) =0a(15) =0a(16) =0a(17) =0
External references
- oeis: A030128