948964262400domain: NAppears in sequencesWrite the integers in groups: 0; 1,2; 3,4,5; 6,7,8,9; ... and form the product of the members of each group.at n=7A056923E.g.f. satisfies A(x) = -log(1 - x * exp(3 * A(x))).at n=9A357393