Denominators of convergents to 2*Pi.

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =53a(5) =113a(6) =16551a(7) =49766a(8) =315147a(9) =364913a(10) =680060a(11) =1725033a(12) =12755291a(13) =65501488a(14) =340262731a(15) =405764219a(16) =1963319607a(17) =2369083826a(18) =6701487259a(19) =283831548704