647504domain: NAppears in sequencesExpress 1 - x - x^2 - x^3 - x^4 - ... as product (1 + g(1)*x) * (1 + g(2)*x^2) *(1 + g(3)*x^3) * ... and use a(n) = - g(n).at n=23A220418Number of multisets of exactly three partitions of positive integers into distinct parts with total sum of parts equal to n.at n=38A320788