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Search: id:A033274
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| A033274 |
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Primes that do not contain any other primes as a substring. |
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+0
7
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| 2, 3, 5, 7, 11, 19, 41, 61, 89, 101, 109, 149, 181, 401, 409, 449, 491, 499, 601, 691, 809, 881, 991, 1009, 1049, 1069, 1481, 1609, 1669, 1699, 1801, 4001, 4049, 4481, 4649, 4801, 4909, 4969, 6091, 6469, 6481, 6869, 6949, 8009, 8069, 8081, 8609, 8669, 8681
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If there is more than one digit, all digits must be nonprime numbers.
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LINKS
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Zak Seidov, Table of n, a(n) for n = 1..1000.
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EXAMPLE
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149 is a term as 1,4,9,14,49 are all nonprimes. 199 is not a member as 19 is a prime.
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CROSSREFS
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Cf. A089768, A089770.
Sequence in context: A065726 A118985 A089769 this_sequence A071062 A002231 A087769
Adjacent sequences: A033271 A033272 A033273 this_sequence A033275 A033276 A033277
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KEYWORD
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base,nonn
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AUTHOR
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Michael Kleber, kleber(AT)brandeis.edu
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EXTENSIONS
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Edited by njas at the suggestion of Luca Colucci, Apr 03 2008
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