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Search: id:A144766
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| A144766 |
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Members of A144719 that are themselves decimal palindromes. |
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+0
1
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OFFSET
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1,1
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COMMENT
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Presumed infinite, but it is difficult to find more terms.
The earlier claim that this sequence is a subsequence of A046450 was incorrect, as the counter-example of 7673767 =97*79111 shows. The reason is that A046450 checks only concatenations in the natural order of the prime factors, but this sequence here allows for both orders, 97//79111 as well as 79111//97, to be palindromic. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 22 2009]
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FORMULA
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Subsequence of (A144719 INTERSECT A046328). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 22 2009]
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EXAMPLE
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10001 = 73 * 137; 73137 is a palindrome.
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CROSSREFS
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Cf. A002113, A046450, A144719
Sequence in context: A069600 A018849 A011814 this_sequence A058412 A006102 A036508
Adjacent sequences: A144763 A144764 A144765 this_sequence A144767 A144768 A144769
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KEYWORD
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base,hard,more,nonn
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AUTHOR
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Reikku Kulon (reikku(AT)gmail.com), Sep 20 2008
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