a(n) = Sum_{k=1..n} binomial(n,k) * sigma(k,n).
A377331
a(n) = Sum_{k=1..n} binomial(n,k) * sigma(k,n).
Terms
- a(0) =1a(1) =7a(2) =58a(3) =707a(4) =11186a(5) =219202a(6) =5097205a(7) =137036819a(8) =4179577045a(9) =142539843882
External references
- oeis: A377331