A089256 Numbers n such that decimal expansion of n^2 has the form D 0 (D+1) for some number D.

155, 274, 2191, 104579630, 142857142, 189126664, 195488721, 241758243, 280035755

Offset

1,1

Comments

No more terms < sqrt(5)*10^9. - David Wasserman, Aug 31 2005

Links

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

Example

2191^2=4800481 = 480 0 481

Mathematica

Select[Table[Sqrt[FromDigits[Join[IntegerDigits[n], {0}, IntegerDigits[ n+1]]]], {n, 785*10^5}], IntegerQ] (* Harvey P. Dale, Oct 20 2019 *)

Crossrefs

Sequence in context: A259379 A122475 A252805 * A112136 A119609 A063340

Adjacent sequences: A089253 A089254 A089255 * A089257 A089258 A089259

Keyword

nonn,base

Author

Yalcin Aktar, Dec 12 2003

Extensions

More terms from David Wasserman, Aug 31 2005

Status

approved