5555550domain: NAppears in sequencesa(n) is the least positive integer in base 10 containing n fives that is divisible by n.at n=5A112900Expansion of e.g.f. 1/(1 - (x * (exp(x) - 1))^4 / 576).at n=13A353885Expansion of e.g.f. exp( (x * (exp(x) - 1))^4 / 576 ).at n=13A353896