login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A035127 Squares which when digits are rotated left once remain square. 1
1, 4, 9, 144, 196, 625, 11664, 14884, 46656, 96100, 1493284, 4112784, 6385729, 9253764, 139287204, 149377284, 187799616, 618268225, 634284225, 678758809, 929884036, 14938217284, 43325589904, 61076696769, 97482577284 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Those resulting in leading zeros are excluded.

LINKS

Table of n, a(n) for n=1..25.

Eric Weisstein's World of Mathematics, Square Number

EXAMPLE

2527^2 = 6385729 -> 3857296 = 1964^2.

MATHEMATICA

okQ[n_]:=Module[{idn=IntegerDigits[n]}, idn[[2]]!=0&&IntegerQ[Sqrt[ FromDigits[RotateLeft[idn]]]]]; Join[{1, 4, 9}, Select[Range[4, 320000]^2, okQ]] (* Harvey P. Dale, Apr 30 2011 *)

CROSSREFS

Cf. A045878, A035131.

Sequence in context: A128524 A027451 A227744 * A061267 A061269 A061271

Adjacent sequences:  A035124 A035125 A035126 * A035128 A035129 A035130

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 15 1998

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 07:59 EDT 2020. Contains 333079 sequences. (Running on oeis4.)