1220781250domain: NAppears in sequencesNumber of strings of length n over Z_5 with trace 0 and subtrace 2.at n=14A073965Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(5^(k-1)).at n=13A344249Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(5^(k-1)).at n=13A344268