Smallest prime for which 2^n exactly divides the class number h(-4p).

A102264

Smallest prime for which 2^n exactly divides the class number h(-4p).

Terms

    a(0) =5a(1) =17a(2) =41a(3) =257a(4) =521a(5) =4481a(6) =9521a(7) =21929a(8) =72089a(9) =531977a(10) =1256009a(11) =5014169a(12) =20879129a(13) =70993529a(14) =258844361a(15) =866941841a(16) =3771185921a(17) =13949589209a(18) =57388297721

External references