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Search: id:A032735
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| A032735 |
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Palindromes that cannot be prefixed or followed by any digit to form a prime. |
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+0
1
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| 11111, 60806, 65356, 1115111, 1392931, 1643461, 1762671, 1797971, 1799971, 1863681, 1911191, 2005002, 2190912, 2429242, 2499942, 2512152, 2708072, 2714172, 2794972, 2845482, 2848482, 2942492, 2993992, 3150513, 3239323
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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11111 prefixed or followed with a digit from (1,2,3,4,5,6,7,8,9) never yields a prime: '2'11111'3' = 29 x 72797.
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CROSSREFS
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Cf. A032682-A032685 and A032702-A032733.
Sequence in context: A032427 A158619 A094324 this_sequence A038447 A115834 A115810
Adjacent sequences: A032732 A032733 A032734 this_sequence A032736 A032737 A032738
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.
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