Numbers that begin a run of consecutive integers k such that PrimePi(k) divides 2^k.

Terms

a(0) =2a(1) =7a(2) =19a(3) =53a(4) =131a(5) =311a(6) =719a(7) =1619a(8) =3671a(9) =8161a(10) =17863a(11) =38873a(12) =84017a(13) =180503a(14) =386093a(15) =821641a(16) =1742537a(17) =3681131a(18) =7754077a(19) =16290047a(20) =34136029a(21) =71378569a(22) =148948139a(23) =310248241a(24) =645155197a(25) =1339484197a(26) =2777105129a(27) =5750079047a(28) =11891268401a(29) =24563311309