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A118098
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Numbers that require three strokes when written in Roman numerals (excluding serifs). III IV VI IX XI LI XC CII CV CX CL.
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2
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3, 4, 6, 9, 11, 51, 90, 102, 105, 110, 150, 201, 300, 400, 501, 600
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Unlike A002963, C is counted as one stroke and D is counted as two strokes here. This sequence is complete up to 3999, though it may contain some more terms such as 5000 depending on the convention used to represent larger numbers. - Nathaniel Johnston, May 18 2011
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FORMULA
| Numbers that require three strokes when written in Roman numerals (excluding serifs).
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CROSSREFS
| Sequence in context: A105527 A094345 A039889 * A022297 A010430 A191287
Adjacent sequences: A118095 A118096 A118097 * A118099 A118100 A118101
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KEYWORD
| nonn,easy,fini
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AUTHOR
| Dylan Nicholson (wizofaus(AT)hotmail.com), May 11 2006
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EXTENSIONS
| a(12)-a(16) from Nathaniel Johnston (nathaniel(AT)nathanieljohnston.com), May 18 2011
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