a(n) = sigma_1(1) + sigma_2(2) + sigma_3(3) + ... + sigma_n-1(n-1) + sigma_n(n).
A245466
a(n) = sigma_1(1) + sigma_2(2) + sigma_3(3) + ... + sigma_n-1(n-1) + sigma_n(n).
Terms
- a(0) =1a(1) =6a(2) =34a(3) =307a(4) =3433a(5) =50883a(6) =874427a(7) =17717436a(8) =405157609a(9) =10414924259a(10) =295726594871
External references
- oeis: A245466