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A122469
Write Roman numerals I, V, X, L, C, D, M in increasing order: [I], [I][V], [I][V][X], ..., etc.
0
1, 15, 1510, 151050, 151050100, 151050100500, 1510501005001000
OFFSET
1,2
COMMENTS
From a quiz.
REFERENCES
K. Russell and P. Carter, Number Puzzles, W. Foulsham and Co. Ltd. (1993).
EXAMPLE
[I] = [1].
[I][V] = [1][5].
[I][V][X] = [1][5][10].
[I][V][X][L] = [1][5][10][50].
[I][V][X][L][C] = [1][5][10][50][100].
[I][V][X][L][C][D] = [1][5][10][50][100][500].
[I][V][X][L][C][D][M] = [1][5][10][50][100][500][1000].
CROSSREFS
Sequence in context: A200994 A338634 A209680 * A119784 A199228 A344638
KEYWORD
nonn,base,fini,full
AUTHOR
Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 14 2006
EXTENSIONS
Edited by Michel Marcus, Aug 06 2013
STATUS
approved