Primes of the form p^2 + p - 1 when p is prime.

Terms

a(0) =5a(1) =11a(2) =29a(3) =131a(4) =181a(5) =379a(6) =991a(7) =1721a(8) =2861a(9) =3539a(10) =6971a(11) =8009a(12) =10301a(13) =10711a(14) =17291a(15) =22349a(16) =26731a(17) =32941a(18) =36671a(19) =37441a(20) =39799a(21) =54521a(22) =58321a(23) =69431a(24) =79241a(25) =109891a(26) =122149a(27) =139501a(28) =161201a(29) =175979