56744domain: NAppears in sequencesGeneralized tangent numbers d_(n,2).at n=22A000176a(n) = Sum_{k=0..n-1} C(n-1,k)* [x^(n-k-1)] A(x)^(k+1) for n>0, with a(0)=1.at n=8A125223Product of n and the sum of all divisors of all positive integers <= n.at n=40A256533