A122469 Write Roman numerals I, V, X, L, C, D, M in increasing order: [I], [I][V], [I][V][X], ..., etc.

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).

Links

Table of n, a(n) for n=1..7.

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

Adjacent sequences: A122466 A122467 A122468 * A122470 A122471 A122472

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