OFFSET
1,2
EXAMPLE
n = 5: phi(5) = 4, 4+16+64+256+1024 = 1364;
n = 22: phi(22) = 10, a(22) = 10+100+...+10^22 = 11111111111111111111110;
n = 101: phi(101) = 100, a(101) = 1010101.....010100, etc.
MATHEMATICA
Table[Apply[Plus, Table[EulerPhi[w]^j, {j, 1, w}]], {w, 1, 25}]
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, Sep 26 2002
STATUS
approved