[seqfan] A154296: primes in A002381 ?

[юрий герасимов]

(3, 7, 29, 31) = fini sequence = A154296 = primes of the form: 1/x + 2/x + 3/x + 4/x + 5/x + 6/x + 7/x..., x = 15.
(Primes of the form (prime(n)^2 - 1)/120) = primes in A002381 = 3, 7, 29, 31, a(5)=? 
Or A154296: primes in A002381 ? 
Regards, 
Juri-Stepan Gerasimov.