the only known "n" satisfying these conditions are 2, 4 and 7, corresponding to the thabit primes 11, 47 and 383 given by "n", the thabit primes 5, 23 and 191 given by "n"−1, and our third terms are 71, 1151 and 73727. (the corresponding amicable pairs are (220, 284), (17296, 18416) and (9363584, 9437056))