login
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
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
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
KEYWORD
base,fini,nonn
AUTHOR
Will Nicholes, Jun 07 2010
STATUS
approved