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4, 121, 10201, 1002001, 100020001, 10000200001, 1000002000001, 100000020000001, 10000000200000001, 1000000002000000001, 100000000020000000001, 10000000000200000000001
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| The members of this sequence are both perfect squares and palindromes. We may deduce from this that there are infinitely many palindromic squares, or equivalently that A002779 is an infinite sequence. [Ant King, Jun 26 2011]
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FORMULA
| a(n) = A062397(n)^2 = A066138(n)+A011557(n)
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CROSSREFS
| Cf. A002779 (palindromic squares), A000290 (squares), A002113 (palindromes).
Sequence in context: A017186 A098839 A071129 * A144508 A169972 A080179
Adjacent sequences: A033931 A033932 A033933 * A033935 A033936 A033937
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KEYWORD
| nonn,easy
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AUTHOR
| Jeff Burch (gburch(AT)erols.com)
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EXTENSIONS
| Better description from Henry Bottomley (se16(AT)btinternet.com), Dec 07 2001
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