A263607 Base 3 numbers whose square is a palindrome in base 3.

0, 1, 2, 11, 101, 102, 202, 211, 1001, 1021, 2002, 10001, 10022, 11012, 12201, 20002, 100001, 100201, 200002, 201102, 1000001, 1000222, 1002201, 1011221, 1101211, 1211201, 1212022, 2000002, 10000001, 10002001, 10200102, 10201121, 11011211, 12212101, 20000002, 20011002, 100000001, 100002222, 100022001

Offset: 1

Author

N. J. A. Sloane, Oct 22 2015

Keywords

• nonn
• base

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..288
• 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, A029984, A263608, A029985.