OFFSET
1,1
COMMENTS
Numbers n such that A085263(a(n)) > 1.
Conjecture: for n > 50, a(n) = n + 11. - Charles R Greathouse IV, Oct 26 2011
LINKS
Eric Weisstein's World of Mathematics, Square Number
Eric Weisstein's World of Mathematics, Squarefree
PROG
(PARI) is(n)=my(t); forstep(k=sqrtint(n-1), 1, -1, if(issquarefree(n-k^2), if(t++>1, return(1)))); 0 \\ Charles R Greathouse IV, Mar 12 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 23 2003
STATUS
approved