110783domain: NAppears in sequencesa(n) = prime(n) * prime(prime(n)).at n=33A073065Product of upper bound twin-prime-indexed primes and their upper bound twin prime.at n=10A080701Number of distinct solutions of sum{i=1..4}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 2..n-2.at n=14A180827