153920

Appears in sequences

• a(n) = sigma((4^n - 1)/3), where sigma(n) is the sum of positive divisors of n.at n=8A102359
• a(n) = (n + 1)*(6*n^2 + 15*n + 4)/2.at n=36A269232
• Sum of the divisors of A001045(n) (Jacobsthal numbers).at n=17A366772