1,1

Related to hyperperfect numbers of a certain form.

The 1017 term produces a 1662-digit number which is only a probable prime. Any additional terms are greater than 1500.

J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3

(PARI) for(n=2, 1500, if(isprime(43^n-42), print1(n, ", ")))

Sequence in context: A125081 A023644 A145387 this_sequence A013022 A012908 A077100

Adjacent sequences: A034920 A034921 A034922 this_sequence A034924 A034925 A034926

nonn

Jud McCranie (j.mccranie(AT)comcast.net)

One more term from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 21 2002