Smallest prime p of two consecutive primes, p < q, such that gcd( p-1, q-1 ) = 2n.

Terms

a(0) =3a(1) =13a(2) =31a(3) =89a(4) =181a(5) =661a(6) =113a(7) =2113a(8) =523a(9) =13421a(10) =2311a(11) =4177a(12) =35543a(13) =39901a(14) =4831a(15) =44417a(16) =1327a(17) =12853a(18) =119321a(19) =52321a(20) =82657a(21) =36389a(22) =136897a(23) =203713a(24) =95651a(25) =59281a(26) =255259a(27) =178697a(28) =531919a(29) =427621