%I #6 Feb 16 2025 08:32:50
%S 2,3,4,5,8,9,25,29,61
%N Numbers having a unique representation as sum of a squarefree number and a square.
%C A085263(a(n))=1; are there more?
%C No more terms through 625000000. - _Ryan Propper_, Jan 05 2008
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquareNumber.html">Square Numbers.</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Squarefree.html">Squarefree</a>
%Y Cf. A085265, A085267.
%K nonn,more,hard,changed
%O 1,1
%A _Reinhard Zumkeller_, Jun 23 2003