A205532 Primes at which occur records of A205531 and A205535.

2, 13, 61, 109, 1009, 2689, 8089, 33049, 53881, 87481, 483289, 515761, 1083289, 3818929, 9257329

Offset: 1

Author

M. F. Hasler, Jan 28 2012

Keywords

• nonn

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.

Links

• P. Underwood, 4.X Selfridge Conjecture (on "Prime Pages" profile), Jan 2012.

Programs

PARI

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