Numbers n such that there are precisely 5 groups of orders n and n + 1.

Terms

a(0) =1107a(1) =1268a(2) =2036a(3) =2163a(4) =2403a(5) =2451a(6) =2612a(7) =3075a(8) =3284a(9) =3411a(10) =3698a(11) =4052a(12) =4388a(13) =4772a(14) =4868a(15) =5156a(16) =5715a(17) =6212a(18) =6452a(19) =6771a(20) =6788a(21) =7011a(22) =7155a(23) =8547a(24) =8612a(25) =8643a(26) =8948a(27) =9092a(28) =9124a(29) =10227