a(n) is the first number k such that the continued fraction for prime(k)/k has length n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =8a(4) =18a(5) =23a(6) =48a(7) =49a(8) =142a(9) =128a(10) =302a(11) =714a(12) =1584a(13) =1809a(14) =3733a(15) =4641a(16) =11281a(17) =12533a(18) =27170a(19) =70759a(20) =170717a(21) =206956a(22) =445933a(23) =431440a(24) =1096122a(25) =909272a(26) =2311327a(27) =7107627a(28) =7371755a(29) =18882236