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Search: id:A084369
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| A084369 |
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Numbers n such that the n-th prime number doesn't contain any even digits. |
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+0
1
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| 2, 3, 4, 5, 6, 7, 8, 11, 12, 16, 17, 20, 21, 22, 25, 30, 32, 33, 34, 36, 37, 40, 41, 43, 44, 45, 46, 64, 65, 66, 67, 68, 71, 72, 74, 75, 78, 102, 105, 106, 108, 109, 128, 130, 131, 133, 134, 137, 139, 156, 157, 159, 162, 164, 165, 167, 168, 187, 190, 191, 193, 196
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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The 22nd prime is 79, the digits 7 and 9 are odd. Thus 22 is in the sequence.
The 9th prime is 23, the digit 2 is even, therefore 9 is not in the sequence.
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MATHEMATICA
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a={}; For[n=1, n<200, n++, If[Length[Select[IntegerDigits[Prime[n]], EvenQ[ # ]&]] == 0, AppendTo[a, n]]]; a
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CROSSREFS
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Cf. A030096 [contains the corresponding primes].
Sequence in context: A023778 A053577 A093515 this_sequence A167211 A067133 A008815
Adjacent sequences: A084366 A084367 A084368 this_sequence A084370 A084371 A084372
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KEYWORD
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base,easy,nonn,less
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Jun 23 2003
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EXTENSIONS
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Edited by Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jun 11 2007
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