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A029990 Numbers n such that n^2 is palindromic in base 6. 1
0, 1, 2, 7, 37, 43, 76, 91, 217, 259, 1064, 1297, 1333, 1519, 1555, 2704, 3367, 7777, 8029, 9079, 19747, 46657, 46873, 47989, 48205, 54439, 54655, 54695, 83979, 118027, 241304, 279937, 281449, 287749, 326599, 707707, 1679617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..37.

Patrick De Geest, Palindromic Squares

MATHEMATICA

palindromicQ[n_, b_:10] := TrueQ[IntegerDigits[n, b] == Reverse[IntegerDigits[n, b]]]; Select[Range[1000], palindromicQ[#^2, 6] &] (* Alonso del Arte, Mar 05 2017 *)

PROG

(PARI) ispal(n, base)=my(d=digits(n, base)); d==Vecrev(d)

is(n)==ispal(n^2, 6) \\ Charles R Greathouse IV, Mar 09 2017

CROSSREFS

Sequence in context: A209251 A274904 A173827 * A042465 A041051 A175487

Adjacent sequences:  A029987 A029988 A029989 * A029991 A029992 A029993

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified December 19 09:19 EST 2018. Contains 318246 sequences. (Running on oeis4.)