2569288370

Appears in sequences

• a(n) = Product_{k=1..n} prime(2k-1), where prime(k) is k-th prime.at n=7A066205
• a(0) = 1, a(1) = 2; for n > 1, a(n) = prime(n)*a(n-2).at n=15A079078
• Multiplicative encoding of triangle formed by reading Pascal's triangle mod 2 (A047999).at n=14A123098
• a(n) = Product_{k=1..n, gcd(n,k) = 1} prime(k).at n=16A308260
• Under the isomorphism defined in A329329, of polynomials in GF(2)[x,y] to positive integers, a(n) is the image of the polynomial that results when x+1 is substituted for x in the polynomial with image n.at n=46A334205