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A142958
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Roman numerals containing three letters (i.e. III, VII, XII, XIV...).
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2
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3, 7, 12, 14, 16, 19, 21, 25, 30, 41, 45, 52, 54, 56, 59, 61, 65, 70, 91, 95, 102, 104, 106, 109, 111, 115, 120, 140, 151, 155, 160, 190, 201, 205, 210, 250, 300, 401, 405, 410, 450, 502, 504, 506, 509, 511, 515, 520, 540, 551, 555, 560, 590, 601, 605, 610, 650
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| Mentioned here: http://www.ronbarnette.com/Zeno/result56.htm
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LINKS
| Nathaniel Johnston, Table of n, a(n) for n = 1..93 (complete up to 3999)
Gerard Schildberger, The first 3999 numbers in Roman numerals.
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MAPLE
| for n from 1 to 3999 do if(length(convert(n, roman)) = 3)then printf("%d, ", n): fi: od: # Nathaniel Johnston, May 18 2011
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MATHEMATICA
| (* go to the hyper link and assign the first 700 Roman numerals to the variable 'lst' so that lst = {I, II, III, ..., DCXCVIII, DCXCIX, DCC} and then *) Select[ Range[2, 1000], StringLength@ SymbolName@ lst[[ # ]] == 3 &] - Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 12 2008
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CROSSREFS
| Cf. A178968.
Sequence in context: A024614 A045134 A081695 * A187481 A062731 A083031
Adjacent sequences: A142955 A142956 A142957 * A142959 A142960 A142961
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KEYWORD
| base,easy,nonn
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AUTHOR
| David Bodycombe (davidbod(AT)hotmail.com), Jul 12 2008
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 12 2008
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