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Greatest prime factor of n
From OeisWiki
n 
n 
44100 
7 
44100 
1 
1 
1 
Sequences
A006530 Largest noncomposite dividingn, n ≥ 1 
n, n ≥ 2 

{1, 2, 3, 2, 5, 3, 7, 2, 3, 5, 11, 3, 13, 7, 5, 2, 17, 3, 19, 5, 7, 11, 23, 3, 5, 13, 3, 7, 29, 5, 31, 2, 11, 17, 7, 3, 37, 19, 13, 5, 41, 7, 43, 11, 5, 23, 47, 3, 7, 5, 17, 13, 53, 3, 11, 7, 19, ...}
See also
 Category:psmooth numbers
 Largest prime dividing n
 A006530
: greatest prime factor of n (greatest prime dividing n), withGpf (n)
.a (1) = 1