a(n) is the least k such that the continued fraction for sqrt(k) has period prime(n).

Terms

a(0) =3a(1) =41a(2) =13a(3) =58a(4) =61a(5) =193a(6) =157a(7) =337a(8) =586a(9) =821a(10) =601a(11) =421a(12) =1117a(13) =1153a(14) =1069a(15) =1669a(16) =2137a(17) =2053a(18) =1381a(19) =3733a(20) =3541a(21) =1621a(22) =4657a(23) =2389a(24) =4561a(25) =6577a(26) =3061a(27) =4261a(28) =5209a(29) =6121