5565651

Appears in sequences

• a(n) = Product_{k=1..n} prime(2k), where prime(k) is the k-th prime.at n=5A066206
• a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2).at n=12A079078
• Seventh column (m=6) of (1,4)-Pascal triangle A095666.at n=34A095669