353690domain: NAppears in sequencesExpansion of e.g.f. sinh(arctan(x) + log(x+1)).at n=9A012965Conjectured number of numbers that are not the sum of three n-gonal numbers, or -1 if infinite.at n=24A118279Conjectured number of numbers that are not the sum of three (2n+1)-gonal numbers; bisection of A118279.at n=12A118281