Primes of the form 15*2^k - 1.A196940Primes of the form 15*2^k - 1.Terms a(0) =29a(1) =59a(2) =239a(3) =479a(4) =15359a(5) =245759a(6) =1966079a(7) =32212254719External referencesoeis: A196940