%I #16 Jan 31 2022 01:10:56
%S 1,2,3,7,8,17,18,27,28,37,38,87,88,187,188,287,288,387,388,788,887,
%T 888,1388,1788,1887,1888,2388,2788,2887,2888,3388,3788,3887,3888
%N Smallest number requiring n chisel strokes for its representation in Roman numerals.
%C A002963(a(n)) = n.  _Reinhard Zumkeller_, Apr 14 2013
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RomanNumerals.html">Roman Numerals</a>
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Roman_numerals">Roman numerals</a>
%o (Haskell)
%o a002964 = (+ 1) . fromJust . (`elemIndex` (map a002963 [1..3888]))
%o  _Reinhard Zumkeller_, Apr 14 2013
%Y Cf. A002963.
%K base,nonn,nice
%O 1,2
%A _N. J. A. Sloane_
%E More terms from _Erich Friedman_
%E For n>13: data corrected and completed up to A002963(3888)=34 by _Reinhard Zumkeller_, Apr 14 2013
