8285760domain: NAppears in sequencesa(n) = (2n)!*Sum_{i=1..n} 1/i.at n=4A046673a(n) = n! * Sum_{k=1..floor(n/2)} 1/k.at n=9A101609n! * Sum[k=1..ceiling(n/2), 1/k].at n=9A101610Expansion of e.g.f. exp(2*x^3) / (1 - x * exp(x^3)).at n=9A375628Expansion of e.g.f. (1/x) * Series_Reversion( x - log(1-x^2)^2 ).at n=9A392791