870037764750domain: NAppears in sequencesa(n) = Product_{i=1..n} prime(i)^i.at n=5A076954For any number n with binary expansion Sum_{k = 1..m} 2^e_k (where 0 <= e_1 < ... < e_m), a(n) = Product_{k = 1..m} prime(1+e_k)^k (where prime(k) denotes the k-th prime number).at n=31A344530