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A058936 Decomposition of Stirling's S(n,2) based on associated numeric partitions. 1

%I

%S 0,1,3,8,3,30,20,144,90,40,840,504,420,5760,3360,2688,1260

%N Decomposition of Stirling's S(n,2) based on associated numeric partitions.

%C These values also appear in a wider context when counting elements of finite groups by cycle structure. For example, the alternating group on four symbols has 12 elements; eight associated with the partition 3+1, three associated with 2+2 and the identity associated with 1+1+1+1. The cross-referenced sequences are all associated with similar numeric partitions and "M2" weights.

%D M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 831.

%H M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

%e After 0, in tabular form the sequence begins 1 3 8 30 144 840 5760 ... 3 20 90 504 3360 ... 40 420 2688 ...

%Y Cf. A000012, A000035, A000027, A004526, A022003, A008619, A000217, A007997, A001399, A011765 A008620, A027656, A002620, A000292, A008627.

%K nonn

%O 1,3

%A _Alford Arnold_, Jan 11 2001

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Last modified April 23 09:35 EDT 2019. Contains 322385 sequences. (Running on oeis4.)