Denominators of convergents to the Dottie number, A003957.

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =19a(5) =23a(6) =939a(7) =962a(8) =9597a(9) =39350a(10) =88297a(11) =127647a(12) =2003002a(13) =4133651a(14) =51606814a(15) =55740465a(16) =1222156579a(17) =1277897044a(18) =22946406327