Primes p such that valuation(p-1,2) is a record.

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =97a(5) =193a(6) =257a(7) =7681a(8) =12289a(9) =40961a(10) =65537a(11) =786433a(12) =5767169a(13) =7340033a(14) =23068673a(15) =104857601a(16) =167772161a(17) =469762049a(18) =2013265921a(19) =3221225473a(20) =75161927681a(21) =77309411329a(22) =206158430209