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A082720
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Plateau and depression primes of the general form a*(10^m-1)/9 +/- b*(10^[ m-1 ]+1) exist for digit lengths a(n).
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22
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3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 29, 31, 33, 37, 41, 49, 53, 55, 59, 61, 65, 67, 69, 73, 75, 83, 85, 87, 93, 95, 97, 101, 103, 105, 111, 113, 115, 117, 121, 127, 129, 141, 157, 161, 171, 193, 201, 205, 209, 231, 247, 291, 323, 343, 351, 353, 361, 367, 401
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9.
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LINKS
| P. De Geest, PDP's Sorted By Length
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CROSSREFS
| Cf. A082697-A082719, A077797, A077799.
Sequence in context: A077797 A033039 A161957 * A033037 A158333 A062505
Adjacent sequences: A082717 A082718 A082719 * A082721 A082722 A082723
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 13 2003.
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