Talk:Euler's totient function

Function call out in various languages seen in OEIS

Axiom eulerPhi
Haskell  ??
Magma EulerPhi
Mathematica EulerPhi
Maple phi
Maxima totient
Pari eulerphi
Python totient (sympy)
Sage euler_phi
--Bill McEachen 00:01, 27 January 2018 (UTC)

That looks about right. However, Googling suggests Haskell doesn't have a built-in totient function: https://wiki.haskell.org/99_questions/Solutions/34 - Alonso del Arte 16:47, 27 January 2018 (UTC)