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Search: id:A117076
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| A117076 |
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Prime numbers with more even digits than odd digits. |
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+0
1
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| 2, 223, 227, 229, 241, 263, 269, 281, 283, 401, 409, 421, 443, 449, 461, 463, 467, 487, 601, 607, 641, 643, 647, 661, 683, 809, 821, 823, 827, 829, 863, 881, 883, 887, 2003, 2027, 2029, 2063, 2069, 2081, 2083, 2087, 2089, 2203, 2207, 2221, 2243, 2267, 2269
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If a prime number's even digits are to outnumber its odd digits, it may not have two digits (as its last digit must be odd.) Neither may it begin with an odd digit if it has three or four digits. The smallest member of this sequence to begin with an odd digit is 10007.
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EXAMPLE
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64969 is a member of this sequence as it is a prime with 3 even and only two odd digits. The primes on either side of it - 64951 and 64997 - are both non-members.
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MATHEMATICA
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Select[Prime[Range[1000]], Sum[DigitCount[ # ][[2i - 1]], {i, 1, 5}] < Sum[DigitCount[ # ][[2i]], {i, 1, 5}] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 18 2006
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CROSSREFS
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Sequence in context: A101393 A124188 A078276 this_sequence A037057 A132936 A110715
Adjacent sequences: A117073 A117074 A117075 this_sequence A117077 A117078 A117079
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KEYWORD
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base,easy,nonn
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AUTHOR
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Andy Edwards (andyngen(AT)aol.com), Apr 18 2006
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 18 2006
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