Numbers k such that prime(k+1) == 1 (mod k).

Terms

a(0) =1a(1) =2a(2) =3a(3) =10a(4) =24a(5) =25a(6) =66a(7) =168a(8) =182a(9) =186a(10) =187a(11) =188a(12) =438a(13) =6462a(14) =40071a(15) =40084a(16) =40085a(17) =40091a(18) =40108a(19) =40118a(20) =251745a(21) =637224a(22) =637306a(23) =637336a(24) =637338a(25) =10553441a(26) =10553445a(27) =10553452a(28) =10553479a(29) =10553515