OFFSET
1,4
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
MATHEMATICA
a[n_] := If[n==1, 0, MaximalBy[FactorInteger[n], #[[1]]^#[[2]]&][[1, 2]]];
Array[a, 100] (* Jean-François Alcover, Dec 03 2021 *)
PROG
(PARI) A088388(n) = if(1==n, 0, my(f=factor(n)); isprimepower(vecmax(vector(#f[, 1], i, f[i, 1]^f[i, 2])))); \\ Antti Karttunen, Jul 22 2018
(Python)
from sympy import factorint
def A088388(n): return max(((p**e, e) for p, e in factorint(n).items()), default=(0, 0))[1] # Chai Wah Wu, Apr 17 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 28 2003
STATUS
approved