OFFSET
1,2
COMMENTS
For n > 4, number of maximal independent generating sets for S_n. Compare A078103.
REFERENCES
P. J. Cameron and P. Cara, Independent generating sets and geometries for symmetric groups, J. Algebra, Vol. 258, no. 2 (2002), 641-650.
MATHEMATICA
Join[{1}, Table[n^(n-2)+(n(n-1))/2 (n-1)^(n-3), {n, 2, 20}]] (* Harvey P. Dale, Apr 26 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 23 2002
STATUS
approved