OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n=1..1000
MATHEMATICA
Table[Floor[Sqrt[DivisorSigma[2, w]]//N]^2, {w, 1, 100}]
PROG
(PARI) sigma2(n)= { local(d, s=0); d=divisors(n); for(i=1, length(d), s+=d[i]^2); return(s) } { for (n=1, 1000, a=sqrtint(sigma2(n))^2; write("b065741.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 29 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, Nov 15 2001
STATUS
approved