a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * sigma_0(k) * a(n-k).
A340903
a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * sigma_0(k) * a(n-k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =20a(4) =139a(5) =1192a(6) =12318a(7) =148318a(8) =2041754a(9) =31616757a(10) =544005172a(11) =10296204096a(12) =212589150300
External references
- oeis: A340903