47071500840domain: NAppears in sequencesExpansion of 1/((1-3*x)*(1-9*x)).at n=11A016142a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 13.at n=8A160972Expansion of x^2/((3*x-1)*(3*x^2-1)).at n=24A167993Cogrowth sequence of the 18-element group S3 X C3 = <S,T,U | S^3, T^2, U^3, (ST)^2, [S,U], [T,U]>.at n=25A378109