OFFSET
0,2
COMMENTS
Number of different schedules for 2n+2 teams. - Andres Cardemil (andrescarde(AT)yahoo.com), Nov 28, 2001
LINKS
Minjia Shi, Li Xu, Denis S. Krotov, The number of the non-full-rank Steiner triple systems, arXiv:1806.00009 [math.CO], 2018.
FORMULA
a(n) = A000438(n+1) * (2*n+1)!.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Joshua Zucker and Joe Keane
EXTENSIONS
Two more terms computed from A000438 by Max Alekseyev, Jun 17 2011
STATUS
approved