393214
domain: N
Appears in sequences
- a(2*n) = 3*2^n - 2; a(2*n+1) = 2^(n+2) - 2.at n=34A027383
- a(n) = 3*2^n - 2.at n=17A033484
- Add 1, double, add 1, double, etc.at n=34A083416
- Duplicate of A033484.at n=17A099018
- Start with 1, then alternately double or add 2.at n=34A099942
- Number of bisymmetric, quasitrivial, and order-preserving binary operations on the n-element set {1,...,n}.at n=18A296953
- a(n) = n! * [x^n] (2*x - 4*exp(x) + 3*exp(2*x) + 3) / 2.at n=18A369491