Continued fraction for tan(1/2).

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =1a(5) =8a(6) =1a(7) =12a(8) =1a(9) =16a(10) =1a(11) =20a(12) =1a(13) =24a(14) =1a(15) =28a(16) =1a(17) =32a(18) =1a(19) =36a(20) =1a(21) =40a(22) =1a(23) =44a(24) =1a(25) =48a(26) =1a(27) =52a(28) =1a(29) =56