|
|
|
|
0, 1, 1, 2, 1, 5, 1, 3, 6, 7, 1, 8, 1, 9, 8, 2, 1, 7, 1, 12, 2, 13, 1, 11, 2, 3, 27, 16, 1, 31, 1, 8, 14, 19, 4, 5, 1, 21, 16, 34, 1, 41, 1, 12, 39, 5, 1, 56, 14, 9, 4, 14, 1, 27, 16, 46, 22, 31, 1, 46, 1, 33, 51, 16, 6, 61, 1, 36, 26, 59, 1, 13, 1, 39, 1, 8, 6, 71, 1, 11, 108, 43, 1, 62, 22, 9, 32, 1, 1, 41, 20
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,4
|
|
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]));
A327860(n) = { my(s=0, m=1, p=2, e); while(n, e = (n%p); m *= (p^e); s += (e/p); n = n\p; p = nextprime(1+p)); (s*m); };
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,frac,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|