Odd numbers k such that the multiplicative orders of 2 modulo k and modulo k+2 are equal.

Terms

a(0) =109a(1) =157a(2) =307a(3) =427a(4) =499a(5) =811a(6) =1015a(7) =1183a(8) =1459a(9) =2013a(10) =2251a(11) =2715a(12) =3181a(13) =3259a(14) =3439a(15) =3541a(16) =3889a(17) =3963a(18) =4303a(19) =4339a(20) =4553a(21) =4909a(22) =5197a(23) =6421a(24) =6661a(25) =6997a(26) =8389a(27) =8707a(28) =8779a(29) =9067