%N Number of occurrences of "I" in all Roman numerals of numbers from 1 to n
%C This sequence is well-defined only up to n=3999 (=MMMCMXCIX, a(3999)=5600).
%H Nathaniel Johnston, <a href="/A152083/b152083.txt">Table of n, a(n) for n = 1..3999</a>
%e For n=4, the Roman numerals up to 4 are I, II, III, IV and these comprise seven I's.
%A Bryce Herdt (mathidentity(AT)yahoo.com), Nov 23 2008