Primes p such that the multiplicative order of 2 modulo p is (p-1)/5.

Terms

a(0) =251a(1) =571a(2) =971a(3) =1181a(4) =1811a(5) =2011a(6) =2381a(7) =2411a(8) =3221a(9) =3251a(10) =3301a(11) =3821a(12) =4211a(13) =4861a(14) =4931a(15) =5021a(16) =5381a(17) =5861a(18) =6221a(19) =6571a(20) =6581a(21) =8461a(22) =8501a(23) =9091a(24) =9461a(25) =10061a(26) =10211a(27) =10781a(28) =11251a(29) =11701