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A076863 n^(n-2)+(n*(n-1)/2)*(n-1)^(n-3). 1

%I #5 Apr 26 2017 11:02:28

%S 1,2,6,34,285,3171,44023,732740,14220153,315233605,7857947691,

%T 217541911830,6621714803509,219780508232663,7899055867765455,

%U 305601002241052936,12662255840668015089,559390257977596068105,26246546675302419239635,1303417502979112415328410

%N n^(n-2)+(n*(n-1)/2)*(n-1)^(n-3).

%C For n > 4, number of maximal independent generating sets for S_n. Compare A078103.

%D P. J. Cameron and P. Cara, Independent generating sets and geometries for symmetric groups, J. Algebra, Vol. 258, no. 2 (2002), 641-650.

%t Join[{1},Table[n^(n-2)+(n(n-1))/2 (n-1)^(n-3),{n,2,20}]] (* _Harvey P. Dale_, Apr 26 2017 *)

%Y A000272 + A052182.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Nov 23 2002

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Last modified May 25 10:45 EDT 2024. Contains 372788 sequences. (Running on oeis4.)