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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 (list; graph; refs; listen; history; text; internal format)
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, A105446-A105448, A105450-A105455.

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

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Last modified January 26 06:28 EST 2021. Contains 340434 sequences. (Running on oeis4.)