140173domain: NAppears in sequencesNumber of (w,x,y,z) with all terms in {1,...,n} and w^2<x^2+y^2+z^2.at n=20A212092Expansion of Product_{k>=0} (1 - x^(2^k))^(2^(k+1)).at n=42A321336Numerators of the sequence c(n) satisfying Sum_{k=0..n} c(k)/(n+k+1) = 0 with c(0)=1.at n=5A323490