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A142958
Roman numerals containing three letters (i.e., III, VII, XII, XIV, ...).
2
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
OFFSET
1,1
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..93 (complete up to 3999)
Ron Barnette's Zeno's Coffeehouse, Challenge #56 Result. Mentions this sequence.
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
MATHEMATICA
(* go to the hyperlink 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, Aug 12 2008 *)
CROSSREFS
Cf. A178968.
Sequence in context: A081695 A290955 A270122 * A310214 A310215 A310216
KEYWORD
base,easy,nonn
AUTHOR
David Bodycombe (davidbod(AT)hotmail.com), Jul 12 2008
EXTENSIONS
More terms from Robert G. Wilson v, Aug 12 2008
STATUS
approved