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A069679
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Primes with either no internal digits or all internal digits are 4.
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9
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2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 149, 241, 347, 349, 443, 449, 541, 547, 641, 643, 647, 743, 941, 947, 1447, 2441, 2447, 3449, 4441, 4447, 5441, 5443, 5449, 6449, 8443, 8447, 14447, 14449, 24443, 44449
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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CROSSREFS
| Cf. A069675, A069676, A069677, A069678, A069680, A069681, A069682, A069683, A069684.
Sequence in context: A077390 A069677 A069678 * A069680 A069681 A069682
Adjacent sequences: A069676 A069677 A069678 * A069680 A069681 A069682
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KEYWORD
| nonn,base
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 06 2002
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EXTENSIONS
| Corrected by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 24 2003
Offset corrected and name changed by Arkadiusz Wesolowski, Sep 07 2011
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