Search: id:A068026
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%I A068026
%S A068026 1,1023,29524,698027,2441406,36192156,47079208,408345795,653757313,
%T A068026 2773708938,2593742460,26912354924,11488207654,51851591352,77226922344,
%U A068026 222984027123,125999618778,848125888467,340614792100,1991478050562
%N A068026 Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,
               ...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) 
               is the sum of k-th powers of divisors of n; m=9.
%F A068026 1/9!*(sigma[1](n)^9 + 36*sigma[1](n)^7*sigma[2](n) + 168*sigma[1](n)^6*sigma[3](n) 
               + 378*sigma[1](n)^5*sigma[2](n)^2 + 756*sigma[1](n)^5*sigma[4](n) 
               + 2520*sigma[1](n)^4*sigma[2](n)*sigma[3](n) +
%F A068026 + 1260*sigma[1](n)^3*sigma[2](n)^3 + 3024*sigma[1](n)^4*sigma[5](n) + 
               7560*sigma[1](n)^3*sigma[2](n)*sigma[4](n) + 3360*sigma[1](n)^3*sigma[3](n)^2 
               + 7560*sigma[1](n)^2*sigma[2](n)^2*sigma[3](n) +
%F A068026 + 945*sigma[1](n)*sigma[2](n)^4 + 10080*sigma[1](n)^3*sigma[6](n) + 18144*sigma[1](n)^2*sigma[2](n)*sigma[5](\
               n) + 15120*sigma[1](n)^2*sigma[3](n)*sigma[4](n) + 11340*sigma[1](n)*sigma[2](n)^2*sigma[4](n) 
               + 10080*sigma[1](n)*sigma[2](n)*sigma[3](n)^2 + 2520*sigma[2](n)^3*sigma[3](n) 
               + 25920*sigma[7](n)*sigma[1](n)^2 +
%F A068026 + 30240*sigma[1](n)*sigma[2](n)*sigma[6](n) + 24192*sigma[1](n)*sigma[3](n)*sigma[5](n) 
               + 11340*sigma[1](n)*sigma[4](n)^2 + 9072*sigma[2](n)^2*sigma[5](n) 
               + 15120*sigma[2](n)*sigma[3](n)*sigma[4](n) + 2240*sigma[3](n)^3 
               + 25920*sigma[7](n)*sigma[2](n) + 45360*sigma[8](n)*sigma[1](n) + 
               20160*sigma[3](n)*sigma[6](n) + 18144*sigma[4](n)*sigma[5](n) + 40320*sigma[9](n)).
%Y A068026 Cf. A067692, A068020-A068025, A068027, A000203, A001157-A001160, A013954-A013957.
%Y A068026 Sequence in context: A023060 A011560 A038997 this_sequence A075946 A075951 
               A075947
%Y A068026 Adjacent sequences: A068023 A068024 A068025 this_sequence A068027 A068028 
               A068029
%K A068026 nonn
%O A068026 1,2
%A A068026 Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 08 2002

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