721764371007
domain: N
Appears in sequences
- a(n) = (n-1)*3^(n-2), n > 0.at n=23A027471
- Denominators of a ternary BBP-type formula for log(3).at n=22A154920
- a(n) = (2*n + 1)*9^n.at n=11A155988
- Denominators of ternary BBP-type series for log(5).at n=17A164985
- E.g.f.: Sum_{n>=1} x^(n^2) * exp(3*x^n) / n!.at n=22A265943
- Expansion of Sum_{n>=1} ( (3 + x^n)^n - 3^n ).at n=22A318638
- G.f.: Sum_{n>=0} (2*n + 1) * x^n * (9 - x^n)^n.at n=11A326605