151932
domain: N
Appears in sequences
- a(0) = 0. If n is odd, a(n) = a(n-1) + n, otherwise a(n) = a(n-1) * n.at n=12A077138
- a(n) = (a(n-1)+(2n-1))*(2n) with a(0) = 0.at n=6A093302
- Trajectory of 1 under repeated application of x -> A306958(x).at n=9A306960
- Trajectory of 2 under repeated application of x -> A306958(x).at n=6A306964
- G.f.: Sum_{k>=0} x^(k*(k+1)) * Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.at n=35A376852