64566801

Appears in sequences

• Expansion of 1/((1-3*x)*(1-9*x)).at n=8A016142
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 10.at n=8A160953
• Expansion of x^2/((3*x-1)*(3*x^2-1)).at n=18A167993
• a(n) = Sum_{d|n} mu(n/d) * d^n / phi(n).at n=8A344210