31381059610
domain: N
Appears in sequences
- a(n) = sigma_22(n), the sum of the 22nd powers of the divisors of n.at n=2A013970
- Numerator of sum of -22nd powers of divisors of n.at n=2A017707
- a(n) = 3^n + 1.at n=22A034472
- Dirichlet convolution of b_n=1 with c_n=3^(n-1).at n=22A034730
- Numbers whose cube is palindromic in base 9.at n=19A046241
- Expansion of g.f. (2-3*x-x^2)/((1-x^2)*(1-3*x)).at n=22A052929
- a(n) = 9^n + 1.at n=11A062396
- Numbers of the form (9^{mr}-1)/(9^r-1) for positive integers m, r.at n=28A076288
- a(n) = 3^n + (-1)^n - [1/(n+1)], where [] represents the floor function.at n=22A084182
- Expansion of (1- 2*x - x^2)/((1-x)*(1-3*x)).at n=23A094388
- a(n) = (-1)^n * [x^n] Sum_{k>=1} x^(k-1)/(1+3*x^k).at n=22A101561
- a(n) = 3^n + (-1)^n.at n=22A102345
- a(n) = 3^n + 1 - 0^n.at n=22A103457
- a(n) = 9^n + 1 - 0^n.at n=11A103460
- a(n) = 2*A132357(n).at n=21A135263
- a(n) = smallest number that leads to a new cycle under the base-9 Kaprekar map of A165110.at n=18A165127
- a(n) = Sum_{d|n} 3^(n-d).at n=22A357051
- a(n) = Sum_{d|n} (-1)^(d-1) * 3^(n/d-1).at n=22A373276