194834domain: NAppears in sequencesNumber of ways to build a contiguous building with n LEGO blocks of size 2 X 4 on top of a fixed block of the same size.at n=2A123830Sum of increasing powers of divisors: a(n) = Sum_{i=1..q} d(i)^i where d(1) < d(2) < ... < d(q) are the divisors of n.at n=20A180851