35672000domain: NAppears in sequencesa(n) = C(2n,n) * (7^n/n!^2) * Product_{k=0..n-1} (7k+1)*(7k+6).at n=3A184896a(n) = A349745(n) divided by 2 if it is even, and 0 if A349745(n) is odd.at n=17A351548