OFFSET
1,1
COMMENTS
a(n) = numbers n such that A243046(n) = 1.
EXAMPLE
4*k/(4+k) and 4*k/(4-k) can both be integers only when k <= 4*3 = 12. Plugging in k = 1, 2, 3, ... 12, one can see that only k = 12 works for both of these expressions (3 and -6, respectively). So 4 is a member of this sequence.
PROG
(PARI) a(n)={t=0; for(k=1, n*(n-1), if(k!=n, if((k*n)%(k+n)==0&&(k*n)%(k-n)==0, t+=1))); return(t)}
n=1; while(n<300, if(a(n)==1, print1(n, ", ")); n+=1)
CROSSREFS
KEYWORD
nonn
AUTHOR
Derek Orr, May 30 2014
STATUS
approved