60459domain: NAppears in sequencesa(n) = C(n,6) + C(n,5) + C(n,4) + C(n,3) + C(n,2) + C(n,1).at n=20A115567Number of strictly increasing arrangements of 5 numbers in -(n+3)..(n+3) with sum zero.at n=26A188183n^3 + 4*n^2 - 5*n + 1.at n=38A241577G.f. A(x) satisfies: 1 = Sum_{n>=0} ( 1 + x*A(x)^n - A(x) )^n.at n=11A303923