Divisors = 1 (mod 4) of Descartes's 198585576189.

Terms

a(0) =1a(1) =9a(2) =13a(3) =21a(4) =33a(5) =49a(6) =57a(7) =61a(8) =77a(9) =117a(10) =121a(11) =133a(12) =169a(13) =209a(14) =273a(15) =361a(16) =429a(17) =441a(18) =549a(19) =637a(20) =693a(21) =741a(22) =793a(23) =1001a(24) =1089a(25) =1197a(26) =1281a(27) =1521a(28) =1573a(29) =1617