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A089256
Numbers n such that decimal expansion of n^2 has the form D 0 (D+1) for some number D.
0
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
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
KEYWORD
nonn,base
AUTHOR
Yalcin Aktar, Dec 12 2003
EXTENSIONS
More terms from David Wasserman, Aug 31 2005
STATUS
approved