17927094321
domain: N
Appears in sequences
- Number of sublattices of index n in generic 9-dimensional lattice.at n=18A038996
- Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=8.at n=18A068025
- a(n) = Sum_{j=0..8} n^j.at n=19A102909
- a(n)=(19^n - 1)/(9*2^(3 - 2*Mod[n, 2])).at n=9A152438
- a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 10.at n=18A160953
- a(n) = (19^n-1)/18.at n=9A218722
- a(n) = ((2*n + 1)^n - 1)/(2*n).at n=8A361291