a(n) is the smallest prime of the form n^k + n - 1 with k >= 2.

Terms

a(0) =5a(1) =11a(2) =19a(3) =29a(4) =41a(5) =349a(6) =71a(7) =89a(8) =109a(9) =131a(10) =20747a(11) =181a(13) =239a(14) =271a(15) =83537a(16) =5849a(17) =379a(18) =419a(19) =461a(20) =2494357909a(21) =279863a(22) =599a(23) =15649a(24) =701a(25) =19709a(26) =811a(28) =929a(29) =991