OFFSET
0,4
COMMENTS
Compare the scatter plot to those of A275735, A353575 and of A353577. - Antti Karttunen, Apr 30 2022
LINKS
FORMULA
PROG
(PARI)
A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1]));
A003557(n) = (n/factorback(factorint(n)[, 1]));
A181819(n) = factorback(apply(e->prime(e), (factor(n)[, 2])));
A276076(n) = { my(i=0, m=1, f=1, nextf); while((n>0), i=i+1; nextf = (i+1)*f; if((n%nextf), m*=(prime(i)^((n%nextf)/f)); n-=(n%nextf)); f=nextf); m; };
CROSSREFS
KEYWORD
AUTHOR
Antti Karttunen, Apr 02 2022
EXTENSIONS
Verbal description added to the definition by Antti Karttunen, Apr 30 2022
STATUS
approved