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A029989 Squares which are palindromes in base 5. 13
0, 1, 4, 36, 676, 961, 4356, 15876, 24336, 391876, 423801, 571536, 646416, 9771876, 10732176, 14107536, 81974916, 244171876, 248094001, 264908176, 339812356, 351787536, 1061326084, 1167042244, 2181263616, 6103671876 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..26.

P. De Geest, Palindromic Squares

G. J. Simmons, On palindromic squares of non-palindromic numbers, J. Rec. Math., 5 (No. 1, 1972), 11-19. [Annotated scanned copy]

MATHEMATICA

pal5Q[n_]:=Module[{idn5=IntegerDigits[n, 5]}, idn5==Reverse[idn5]]; Select[ Range[0, 80000]^2, pal5Q] (* Harvey P. Dale, May 05 2012 *)

CROSSREFS

Cf. A002778, A003166, A263611, A263612, A029988.

Sequence in context: A268470 A214347 A208732 * A163887 A156630 A145565

Adjacent sequences:  A029986 A029987 A029988 * A029990 A029991 A029992

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified June 29 12:13 EDT 2017. Contains 288860 sequences.