470595

Appears in sequences

• Product of two consecutive odd numbers k, k+2 such that (k*(k+2))+-2 are primes.at n=18A174383
• Numbers of the form i*7^j-1 (i=1..6, j >= 0).at n=39A181303
• a(n) = 4*7^n-1.at n=6A198686