60585domain: NAppears in sequencesNumbers that are the sum of 6 positive 9th powers.at n=21A003395E.g.f.: sec(sec(x)*sinh(x))=1+1/2!*x^2+21/4!*x^4+837/6!*x^6+60585/8!*x^8...at n=4A012819E.g.f. A(x) satisfies A(x) = 1/( 1 - 3*x*exp(x)*A(x) )^(1/3).at n=5A380045