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Search: id:A048054
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| A048054 |
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Number of n-digit reversible primes (emirps). |
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+0
11
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| 4, 9, 43, 204, 1499, 9538, 71142, 535578, 4197196, 33619380
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The count includes palindromes.
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EXAMPLE
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2, 3, 5 and 7 are 1-digit reversible primes, so a(1)=4.
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CROSSREFS
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Cf. A003684, A006567, A007628, A046732, A048051, A048052, A048053, A048895.
Sequence in context: A070761 A138544 A093149 this_sequence A024053 A048892 A108849
Adjacent sequences: A048051 A048052 A048053 this_sequence A048055 A048056 A048057
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KEYWORD
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base,nonn
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AUTHOR
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Jud McCranie (j.mccranie(AT)comcast.net)
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