A274514 a(n) is the only number m such that 12^(2^m) + 1 is divisible by A273950(n).

1, 0, 3, 1, 2, 3, 2, 7, 5, 6, 12, 15, 6, 4, 14, 3, 11, 11, 18, 8, 12, 19, 18, 6, 12, 18, 19, 11, 21, 10, 19, 29, 8, 26, 16, 4, 38, 21, 23, 39, 14, 42, 40, 30

Offset

1,3

Links

Table of n, a(n) for n=1..44.

Prog

(PARI) forstep(p=3, 10^15, 2, if(!Mod(p, 3)==0, if(isprime(p), o=znorder(Mod(12, p)); x=ispower(2*o); if(2^(x-1)==o, print1(x-2, ", ")))));

Crossrefs

Cf. A273950.

Sequence in context: A305391 A165084 A029279 * A342932 A026181 A327239

Adjacent sequences: A274511 A274512 A274513 * A274515 A274516 A274517

Keyword

nonn,more

Author

Arkadiusz Wesolowski, Jun 25 2016

Status

approved