Least prime p such that q = (3+p)/2^n is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =13a(4) =29a(5) =61a(6) =317a(7) =3709a(8) =509a(9) =1021a(10) =11261a(11) =4093a(12) =20477a(13) =16381a(14) =180221a(15) =229373a(16) =1900541a(17) =655357a(18) =15990781a(19) =1048573a(20) =5242877a(21) =4194301a(22) =180355069a(23) =16777213a(24) =117440509a(25) =436207613a(26) =738197501a(27) =671088637a(28) =53687090a(29) =2684354557