

A227534


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


2



2, 22, 34, 62, 86, 202, 398, 2042, 6998, 12514, 12758, 33406, 48962, 101554, 154186, 197378, 298366
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OFFSET

1,1


COMMENTS

Essentially position of records in A227533.
Probably all terms beyond the first are even semiprimes: conjecturally this is a subsequence of A001747.


LINKS

Table of n, a(n) for n=1..17.


PROG

(PARI) r=0; forstep(n=2, 1e5, 2, t=1; while(!istotient(n^t++), ); if(t>r, r=t; print1(n", ")))
\\ See also A227533 for a more efficient method of computing terms.


CROSSREFS

Cf. A227533, A227535.
Sequence in context: A156441 A094625 A130751 * A126913 A019593 A060108
Adjacent sequences: A227531 A227532 A227533 * A227535 A227536 A227537


KEYWORD

nonn,hard


AUTHOR

Charles R Greathouse IV, Jul 14 2013


EXTENSIONS

a(14) from Charles R Greathouse IV, Jul 16 2013
a(15) from Charles R Greathouse IV, Jul 17 2013
a(16)a(17) from Charles R Greathouse IV, Jul 19 2013


STATUS

approved



