167643domain: NAppears in sequencesG.f.: A(q) = exp( Sum_{n>=1} A002129(n) * 3*A038500(n) * q^n/n ).at n=29A161804A trisection of A161804: a(n) = A161804(3n+2) for n>=0.at n=9A161807Constant term of the reduction by x^2 -> x+1 of the polynomial p(n,x) defined below in Comments.at n=18A192421