235357947067
domain: N
Appears in sequences
- a(0) = 1; a(n) = (5*3^(n-1) - 1)/2 for n > 0.at n=24A060816
- Smallest prime p such that 2*p+1 has n prime factors (with multiplicity).at n=23A072060
- a(0)=3, a(n) = 3*a(n-1) + 2*(-1)^n.at n=23A096019
- a(n) is the least prime of the form (3^j*5^k - 1)/2, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.at n=22A337423