login
G.f.: exp( Sum_{n>=1} A174472(n)*x^n/n ) where A174472(n) = Sum_{d|n} d^sigma(d).
1

%I #2 Mar 30 2012 18:37:21

%S 1,1,5,32,4138,7371,362821209,363768114,4399869984980,4692111613957,

%T 100023774005024513,100145112875103405,137370551968043406735177291498,

%U 137370551970759432867153686743,687082347540023318264721577813

%N G.f.: exp( Sum_{n>=1} A174472(n)*x^n/n ) where A174472(n) = Sum_{d|n} d^sigma(d).

%o (PARI) {a(n)=polcoeff(exp(sum(m=1,n,x^m/m*sumdiv(m,d,d^sigma(d)))+x*O(x^n)),n)}

%Y Cf. A174472, A000203 (sigma).

%K nonn

%O 0,3

%A _Paul D. Hanna_, Apr 04 2010