Primes of the form n^2*totient(n)+1 (or A053191(n) + 1).

Terms

a(0) =2a(1) =5a(2) =19a(3) =101a(4) =73a(5) =257a(6) =487a(7) =401a(8) =577a(9) =2029a(10) =1801a(11) =23549a(12) =29401a(13) =25601a(14) =21169a(15) =77659a(16) =83233a(17) =52489a(18) =121001a(19) =57601a(20) =115321a(21) =87121a(22) =197137a(23) =564899a(24) =462401a(25) =697049a(26) =649801a(27) =403369a(28) =588061a(29) =1020101