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A035126 Squares when digits rotated right once remain square. 2
1, 4, 9, 256, 441, 961, 16641, 48841, 61009, 66564, 1127844, 2537649, 3857296, 4932841, 182682256, 298840369, 342842256, 392872041, 493772841, 787588096, 877996161, 10766967696, 33255899044, 49382172841, 74825772849 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Those resulting in leading zeros excluded.

LINKS

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

Eric Weisstein's World of Mathematics, Square Number

FORMULA

a(n) = A045877(n)^2. - R. J. Mathar, Jan 25 2017

EXAMPLE

2221^2 = 4932841 -> 1493284 = 1222^2. Note that the root behaves accordingly!

MATHEMATICA

Select[Range[300000]^2, IntegerQ[Sqrt[FromDigits[RotateRight[ IntegerDigits[ #]]]]]&] (* Harvey P. Dale, Mar 22 2015 *)

PROG

(MAGMA) [k:k in [m^2:m in [1..10^6]]| IsSquare(Seqint( (Intseq(Floor(k/10)) cat  [ Intseq(k)[1]])))]; // Marius A. Burtea, Oct 08 2019

CROSSREFS

Cf. A045877, A035130.

Sequence in context: A299122 A167657 A175700 * A178454 A051671 A109103

Adjacent sequences:  A035123 A035124 A035125 * A035127 A035128 A035129

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 15 1998

STATUS

approved

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Last modified November 14 04:56 EST 2019. Contains 329110 sequences. (Running on oeis4.)