12684118629domain: NAppears in sequencesa(n) = Product_{k=1..n} prime(2k), where prime(k) is the k-th prime.at n=7A066206a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2).at n=16A079078Second column T[.,2] of array T = A255483: T[0,j] = prime(j), T[i+1,j] = T[i,j]*T[i,j+1]/gcd(T[i,j],T[i,j+1])^2, i >= 0, j >= 1.at n=14A276804