Length of period of continued fraction expansion of square root of (2^(2n+1)+1).

Terms

a(0) =4a(1) =10a(2) =16a(3) =44a(4) =74a(5) =46a(6) =204a(7) =714a(8) =702a(9) =908a(10) =404a(11) =7754a(12) =1136a(13) =9886a(14) =8154a(15) =23578a(16) =65096a(17) =404762a(18) =23992a(19) =3514774a(20) =110124a(21) =4802160a(22) =6490450a(23) =180832a(24) =115972a(25) =770304a(26) =62665998a(27) =133093360a(28) =1019300318a(29) =60079334