login
A276504
Numbers n such that phi(n) = phi(n+11), with Euler's totient function phi = A000010.
3
7, 11, 27, 33, 45, 63, 135, 165, 285, 304, 345, 765, 855, 964, 1144, 1575, 1744, 2134, 2295, 2805, 6424, 6604, 10725, 23584, 24244, 27645, 28875, 31174, 31354, 35445, 40755, 44164, 46672, 57046, 57057, 61444, 64005, 78975, 82095, 90195
OFFSET
1,1
MATHEMATICA
Select[Range[150000], EulerPhi[#] == EulerPhi[# + 11] &]
PROG
(Magma) [n: n in [1..100000] | EulerPhi(n) eq EulerPhi(n+11)];
CROSSREFS
Cf. A000010.
Cf. similar sequences listed in A276503.
Sequence in context: A134043 A102373 A002643 * A039287 A045222 A002810
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Sep 08 2016
STATUS
approved