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Search: id:A107666
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| A107666 |
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Primes with semiprime digits (digits 4, 6, 9 only). |
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+0
7
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| 449, 499, 4649, 4969, 4999, 6449, 6469, 6949, 9649, 9949, 44449, 44699, 46499, 46649, 49499, 49669, 49999, 64499, 64969, 66449, 66499, 66949, 69499, 94649, 94949, 94999, 96469, 99469, 444449, 444469, 444649, 446969, 449699, 464699
(list; graph; listen)
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OFFSET
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1,1
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CROSSREFS
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Cf. A107665 (numbers with semiprime digits), A001358 (semiprimes), A051416 (primes whose digits are all composite), A020466 (primes with digits 4 and 9 only), A093402 (primes of form 44...9), A093945 (primes of form 499...).
Cf. A107342, A111494, A111496, A111697.
Sequence in context: A120104 A071104 A087700 this_sequence A020466 A142420 A105376
Adjacent sequences: A107663 A107664 A107665 this_sequence A107667 A107668 A107669
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KEYWORD
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base,nonn
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 19 2005
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