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A263610 Palindromes in base 4 which are also squares. 1
0, 1, 121, 10201, 12321, 1002001, 1032301, 1223221, 100020001, 102030201, 103101301, 120202021, 10000200001, 10033233001, 1000002000001, 1002003002001, 1003010103001, 1021320231201, 1211130311121, 1212110112121, 1213332333121, 100000020000001, 100033323330001, 100331000133001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..24.

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

CROSSREFS

Cf. A002778, A003166, A029986, A262609, A029987.

Sequence in context: A238320 A144766 A277946 * A176923 A058412 A231661

Adjacent sequences:  A263607 A263608 A263609 * A263611 A263612 A263613

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Oct 22 2015

STATUS

approved

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Last modified August 17 17:25 EDT 2019. Contains 326059 sequences. (Running on oeis4.)