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A115761 Numbers n such that the digits of n^2, reversed, include digits of n as substring. 5
1, 5, 6, 27, 74, 963, 5723, 6142, 6524, 9867, 53152, 65766, 69714, 351732, 409761, 497674, 624279, 664902, 697140, 781101, 2733747, 3879405, 4897317, 5031485, 6317056, 6971400, 8403702, 9324454, 16013465, 21646858, 34679962, 36909226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..32.

EXAMPLE

963^2 = 927(369).

MATHEMATICA

fQ[n_] := StringPosition[ IntegerString[n^2], StringReverse@ IntegerString@n] != {}; k = 1; lst = {}; While[k < 38794050, If[ fQ@k, AppendTo[lst, k]]; k++ ]; lst (* Robert G. Wilson v, Jul 28 2010 *)

Select[Range[37*10^6], SequenceCount[Reverse[IntegerDigits[#^2]], IntegerDigits[ #]]>0&] (* The program uses the SequenceCount function from Mathematica version 10 *) (* Harvey P. Dale, May 02 2016 *)

CROSSREFS

Contains A269588 as a subsequence.

Cf. A115762, A115763, A115764, A115738, A179803.

Sequence in context: A022165 A022163 A048060 * A249221 A127040 A041011

Adjacent sequences:  A115758 A115759 A115760 * A115762 A115763 A115764

KEYWORD

base,nonn

AUTHOR

Giovanni Resta, Jan 30 2006

EXTENSIONS

More terms from Robert G. Wilson v, Jul 28 2010

STATUS

approved

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Last modified August 16 13:36 EDT 2017. Contains 290623 sequences.