124607domain: NAppears in sequencesExpansion of Sum_{p prime, i>=1} x^(p^i)/(1 - x^(p^i)) / Product_{p prime, j>=1} (1 - x^(p^j)).at n=53A281616Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-sin(x)) ).at n=7A381145