OFFSET
3,3
LINKS
Harry J. Smith, Table of n, a(n) for n = 3..1000
PROG
(PARI) H(n)=eulerphi(n)/2; j=[]; for(n=3, 150, j=concat(j, sumdiv(H(n), d, d^2))); j
(PARI) { for (n=3, 1000, write("b063475.txt", n, " ", sumdiv(eulerphi(n)/2, d, d^2)) ) } \\ Harry J. Smith, Aug 22 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Jason Earls, Jul 27 2001
STATUS
approved