774840979
domain: N
Appears in sequences
- a(n) = 1 + 2*3^(n-1) with a(0)=2.at n=19A052919
- Number of layers of dough separated by butter in successive foldings of croissant dough.at n=19A100702
- 2*3^(n-1)-(-1)^n.at n=18A174132
- Composites of the form 2*n^n + 1 = A216147(n).at n=7A174711
- a(n) = 2*9^n+1.at n=9A199559
- a(n) = 2*n^n + 1.at n=9A216147
- Number of divisors of n^(n^n).at n=8A249784
- a(0) = 0, a(1) = 2, a(2) = 1, and for any n > 2 with ternary representation n = Sum_{i=0..k} t_i * 3^i, a(n) = Sum_{i=0..k} a(t_i) * 3^a(i).at n=29A300956