OFFSET
1,4
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
PROG
(PARI) C(n)=n-eulerphi(n); j=[]; for(n=1, 200, j=concat(j, sumdiv(C(n), d, d^2))); j
(PARI) { for (n=1, 1000, if (n>1, a=sumdiv(n-eulerphi(n), d, d^2), a=0); write("b063476.txt", n, " ", a) ) } \\ Harry J. Smith, Aug 22 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Jason Earls, Jul 27 2001
STATUS
approved