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A178714 Smallest number whose Roman numeral representation shares no letters with the previous number in the sequence 1
1, 5, 2, 10, 3, 15, 50, 4, 20, 6, 30, 7, 40, 8, 60, 100, 9, 55, 11, 105, 12, 150, 13, 155, 19, 200, 14, 250, 16, 300, 17, 350, 18, 400, 21, 205, 22, 255, 23, 305, 29, 355, 31, 405, 32, 450, 24, 500, 25, 51, 35, 52, 90, 53, 95, 501, 45, 101, 65, 102, 70, 103, 75, 201, 80, 104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A(1) is 1. A(n) is the smallest number not yet listed whose Roman numeral representation has no letters in common with the Roman numeral representation of A(n-1).

LINKS

Will Nicholes, Table of n, a(n) for n=1..163

EXAMPLE

The first entry is 1 (Roman numeral I). The next entry is the smallest number that does not have "I" in its Roman numeral representation, which is 5 (Roman numeral V). The next entry is the smallest number that does not have "V" in its Roman numeral representation, which is 2 (Roman numeral II).

CROSSREFS

Sequence in context: A127097 A040024 A196385 * A036121 A162396 A194046

Adjacent sequences:  A178711 A178712 A178713 * A178715 A178716 A178717

KEYWORD

base,fini,nonn

AUTHOR

Will Nicholes, Jun 07 2010

STATUS

approved

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Last modified September 26 05:09 EDT 2017. Contains 292502 sequences.