235794769

Appears in sequences

• a(n) = (11^(n+1) - 1)/10.at n=8A016123
• Number of sublattices of index n in generic 9-dimensional lattice.at n=10A038996
• 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=10A068025
• a(n) = Sum_{j=0..8} n^j.at n=11A102909
• a(n) = ((n+1)^(n-1) - 1)/n.at n=9A125598
• a(n) = (11^n - 1)/(5*2^(3 - 2*(n mod 2))).at n=9A152435
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 10.at n=10A160953