
COMMENTS

Related to the 4.X Selfridge Conjecture by P. Underwood, cf. link.
Records occur at [A205532(n), A205534(n)] = [2, 1], [13, 3], [61, 5], [109, 6], [1009, 9], [2689, 11], [8089, 15], [33049, 17], [53881, 21], [87481, 27], [483289, 29], [515761, 35], [1083289, 39], [3818929, 45], [9257329, 51],...
It appears that a(n)=A102295(n+1) for n>4; they are also terms of A002224 and A096637.


PROG

(PARI) m=1; forprime(p=1, default(primelimit), if(m+0<m=max(m, A205535(p), m), print1(p", ")))
