OFFSET
1,2
EXAMPLE
m=64,s1=127,{s2/127,s4/127,s6/127,s8/127,s10/127}= {1,43,140911,549687103,2225029922431,9086996103150463}; m=14580=54.54.5. Known cases show that terms are either squares or p.square, where p is a prime of 4k+1 form.
MATHEMATICA
Select[Range[3200000], And@@Divisible[DivisorSigma[2Range[5], #], DivisorSigma[ 1, #]]&] (* Harvey P. Dale, Apr 10 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 17 2002
STATUS
approved