

A105449


Positive integers whose representation as Roman Fibonacci numbers has exactly four symbols.


4



80, 106, 114, 116, 117, 119, 120, 121, 122, 127, 129, 130, 135, 137, 138
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OFFSET

1,1


COMMENTS

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.


LINKS

Table of n, a(n) for n=1..15.


FORMULA

a(n) is an element of A105449 iff A105446(n) = 4.


EXAMPLE

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".


CROSSREFS

Cf. A000045, A006968, A105446A105448, A105450A105455.
Sequence in context: A039545 A322162 A143755 * A223084 A043223 A039400
Adjacent sequences: A105446 A105447 A105448 * A105450 A105451 A105452


KEYWORD

base,easy,nonn


AUTHOR

Jonathan Vos Post, Apr 09 2005


STATUS

approved



