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Search: id:A115024
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| A115024 |
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Natural numbers n such that number of primes factors is equal to the number of decimal digits of n. |
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+0
1
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| 2, 3, 5, 7, 10, 14, 15, 21, 22, 25, 26, 33, 34, 35, 38, 39, 46, 49, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, 102, 105, 110, 114, 116, 117, 124, 125, 130, 138, 147, 148, 153, 154, 164, 165, 170, 171, 172, 174, 175, 182, 186, 188, 190, 195
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Select[Range[2, 300], Sum[FactorInteger[ # ][[i]][[2]], {i, 1, Length[FactorInteger[ # ]]}] == Floor[Log[10, # ] + 1] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 27 2006
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CROSSREFS
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Adjacent sequences: A115021 A115022 A115023 this_sequence A115025 A115026 A115027
Sequence in context: A035954 A023192 A064480 this_sequence A019529 A130053 A025488
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KEYWORD
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base,easy,nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Feb 24 2006
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Feb 27 2006
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