A085266 Numbers having a unique representation as sum of a squarefree number and a square.

2, 3, 4, 5, 8, 9, 25, 29, 61

Offset

1,1

Comments

A085263(a(n))=1; are there more?

No more terms through 625000000. - Ryan Propper, Jan 05 2008

Links

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Square Numbers.

Eric Weisstein's World of Mathematics, Squarefree

Crossrefs

Cf. A085265, A085267.

Sequence in context: A295033 A152606 A057911 * A280431 A056804 A305399

Adjacent sequences: A085263 A085264 A085265 * A085267 A085268 A085269

Keyword

nonn,more,hard

Author

Reinhard Zumkeller, Jun 23 2003

Status

approved