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a(n) is the only number m such that 4^(2^m) - 2^(2^m) + 1 is divisible by A275528(n).
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%I #11 Aug 04 2016 22:37:24

%S 0,1,3,4,2,3,6,10,16,4,13,13,19,23,27,21,15,26,25,28,34,25,22,11,29,

%T 30,13

%N a(n) is the only number m such that 4^(2^m) - 2^(2^m) + 1 is divisible by A275528(n).

%o (PARI) forprime(p=3, 10^15, o=znorder(Mod(2, p))/3; x=ispower(2*o); if(p==3||2^(x-1)==o, if(x<2, print1(0, ", "), print1(x-2, ", "))));

%Y Cf. A275528.

%K nonn,more

%O 1,3

%A _Arkadiusz Wesolowski_, Jul 31 2016