A072392 - OEIS

A072392

Numbers n such that reverse(n) = phi(n) (mod n).

21, 27, 37, 63, 270, 291, 397, 1545, 1853, 2991, 6102, 15503, 27036, 48776, 198683, 200882, 274536, 1061361, 2348128, 2723436, 2746836, 3542805, 3564217, 3868867, 3962197, 4438616, 19844683, 46676013, 69460293, 198444683, 202195682, 297828396, 309520655

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..33.

EXAMPLE

reverse(48776) = 67784 = 19008 (mod 48776) and 19008 = phi(48776), so 48776 is a term of the sequence.

MATHEMATICA

Select[Range[10^5], Mod[ FromDigits[Reverse[IntegerDigits[n]]], # ] == EulerPhi[ # ] &]

CROSSREFS

Cf. A000010, A103168.

Sequence in context: A206347 A362008 A247316 * A144415 A098898 A098768