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A227534 Even numbers n such that the least e with n^e a totient is a new record. 2

%I #17 Sep 27 2015 10:29:07

%S 2,22,34,62,86,202,398,2042,6998,12514,12758,33406,48962,101554,

%T 154186,197378,298366

%N Even numbers n such that the least e with n^e a totient is a new record.

%C Essentially position of records in A227533.

%C Probably all terms beyond the first are even semiprimes: conjecturally this is a subsequence of A001747.

%o (PARI) r=0;forstep(n=2,1e5,2, t=1; while(!istotient(n^t++),); if(t>r,r=t;print1(n", ")))

%o \\ See also A227533 for a more efficient method of computing terms.

%Y Cf. A227533, A227535.

%K nonn,hard

%O 1,1

%A _Charles R Greathouse IV_, Jul 14 2013

%E a(14) from _Charles R Greathouse IV_, Jul 16 2013

%E a(15) from _Charles R Greathouse IV_, Jul 17 2013

%E a(16)-a(17) from _Charles R Greathouse IV_, Jul 19 2013

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)