90347domain: NAppears in sequencesDenominators of u(n) where u(n) = (u(n-1) + u(n-2)) / u(n-3), with u(1) = u(2) = u(3) = 1.at n=19A185341Expansion of Product_{k>=1} 1/(1-x^(k+7))^k.at n=52A263363