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A032736
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a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).
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0
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14612, 27971, 29289, 33170, 36186, 38327, 39608, 40078, 41165, 41528, 43277, 44657, 47382, 55553, 55791, 58899, 60806, 62318, 63056, 65970, 66818, 70558, 73851, 80477, 81167, 83986, 86145, 89072, 89280, 90379, 91538, 93160, 96222
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| 60806 prefixed with a digit from ('',1,2,3,4,5,6,7,8,9) and followed by a digit from (1,3,7,9) never yields a prime: '_'60806'3' = 43 x 79 x 179; '1'14612'3' = 3^3 x 11 x 17 x 227.
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CROSSREFS
| Cf. A032682-A032685 and A032702-A032733.
Sequence in context: A175972 A175973 A153428 * A032738 A133858 A023683
Adjacent sequences: A032733 A032734 A032735 * A032737 A032738 A032739
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.
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