

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
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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(n1).


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



