-2164domain: ZAppears in sequencesTriangle of coefficients, read by row polynomials P_n(y), that satisfy the g.f.: A038497(x,y) = Product_{n>=1} 1/(1-x^n)^[P_n(y)/n], with P_n(0)=0 for n>=1 and P_0(0)=1.at n=69A096797Alternating sum of centered heptagonal pyramidal numbers.at n=15A270694