230241domain: NAppears in sequencesTriangle T(n,k) read by rows: the coefficient [x^k] of the product_{s=1..n} (x+64*cos(s*Pi/(2n+1))^6), 0<=k<=n.at n=30A179838Number of (w,x,y,z) with all terms in {1,...,n} and w<2x+y+z.at n=22A212145