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Search: id:A105449
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| A105449 |
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Positive integers whose representation as Roman Fibonacci numbers has exactly four symbols. |
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+0
3
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| 80, 106, 114, 116, 117, 119, 120, 121, 122, 127, 129, 130, 135, 137, 138
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A105446 gives the number of symbols in Roman Fibonacci numbers. A105447 gives positive integers whose representation as Roman Fibonacci numbers has exactly two symbols. A105448 gives positive integers whose representation as Roman Fibonacci numbers has exactly three symbols. A105450 gives positive integers whose representation as Roman Fibonacci numbers has exactly five symbols.
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FORMULA
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a(n) is an element of A105449 iff A105446(n) = 4.
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EXAMPLE
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In Roman Fibonacci number representation:
80 = "DB22", 106 = "EA22", 114 = "DD22", 116 = "DD33", 117 = "DD52", 119 = "DD81", 120 = "DD55", 121 = "DD2A", 122 = "DD1A", 127 = "BF22", 129 = "BF33", 130 = "BF52", 135 = "AF22", 137 = "AF33", 138 = "AF52".
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CROSSREFS
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Cf. A000045, A006968, A105446-A105448, A105450-A105455.
Sequence in context: A054983 A039545 A143755 this_sequence A043223 A039400 A044003
Adjacent sequences: A105446 A105447 A105448 this_sequence A105450 A105451 A105452
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KEYWORD
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base,easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Apr 09 2005
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