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A122469
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Write Roman numerals I, V, X, L, C, D, M in increasing order: [I], [I][V], [I][V][X], ..., etc.
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%I #11 Aug 08 2019 01:58:16
%S 1,15,1510,151050,151050100,151050100500,1510501005001000
%N Write Roman numerals I, V, X, L, C, D, M in increasing order: [I], [I][V], [I][V][X], ..., etc.
%C From a quiz.
%D K. Russell and P. Carter, Number Puzzles, W. Foulsham and Co. Ltd. (1993).
%e [I] = [1].
%e [I][V] = [1][5].
%e [I][V][X] = [1][5][10].
%e [I][V][X][L] = [1][5][10][50].
%e [I][V][X][L][C] = [1][5][10][50][100].
%e [I][V][X][L][C][D] = [1][5][10][50][100][500].
%e [I][V][X][L][C][D][M] = [1][5][10][50][100][500][1000].
%K nonn,base,fini,full
%O 1,2
%A Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 14 2006
%E Edited by _Michel Marcus_, Aug 06 2013
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