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A233516 Where records occur in A061026, the smallest number m such that n divides phi(m), where phi is Euler's totient function. 2
1, 2, 3, 5, 7, 13, 17, 19, 31, 59, 85, 109, 133, 167, 197, 227, 317, 389, 457, 521, 799, 859, 1153, 1163, 1637, 1861, 1997, 2053, 2633, 3011, 3167, 3721, 3833, 5227, 6637, 7213, 9199, 12919, 13259, 13469, 14263 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Not all of these numbers are prime. The record values are in A233517.

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

t2 = {{1, 1}}; Do[k = 1; While[Mod[EulerPhi[k], n] > 0, k++]; If[k > t2[[-1, 2]], AppendTo[t2, {n, k}]; Print[{n, k}]], {n, 2, 10^3}]; Transpose[t2][[1]]

CROSSREFS

Cf. A061026, A233517.

Sequence in context: A183073 A123856 A120857 * A000043 A109799 A152961

Adjacent sequences:  A233513 A233514 A233515 * A233517 A233518 A233519

KEYWORD

nonn

AUTHOR

T. D. Noe, Feb 12 2014

STATUS

approved

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Last modified October 22 09:57 EDT 2018. Contains 316433 sequences. (Running on oeis4.)