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A003587 Roman numerals with 1 letter, in numerical order; then those with 2 letters, etc. 7
1, 5, 10, 50, 100, 500, 1000, 2, 4, 6, 9, 11, 15, 20, 40, 51, 55, 60, 90, 101, 105, 110, 150, 200, 400, 501, 505, 510, 550, 600, 900, 1001, 1005, 1010, 1050, 1100, 1500, 2000, 3, 7, 12, 14, 16, 19, 21, 25, 30, 41, 45, 52, 54, 56, 59, 61, 65, 70, 91, 95, 102, 104, 106, 109, 111, 115, 120, 140, 151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..67.

EXAMPLE

Written in Roman, the sequence reads: I, V, X, L, C, D, M, II, IV, VI, IX, XI, XV, XX, XL, LI, LV, LX, XC, CI, CV, CX, CL, CC, CD, DI, DV, DX, DL, DC, CM, MI, MV, MX, MV, MC, MD, MM, III, VII, XII, ... - M. F. Hasler, Jan 12 2015

PROG

(PARI) for(d=1, 4, for(n=d, d*1000, A006968(n)==d && print1(n", "))) \\ M. F. Hasler, Jan 12 2015

CROSSREFS

Cf. A003588, A036746, A061493, A006968.

Sequence in context: A271275 A270100 A271287 * A268100 A205884 A032088

Adjacent sequences:  A003584 A003585 A003586 * A003588 A003589 A003590

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, J. H. Conway and John Jackson (ab158(AT)freenet.uchsc.edu)

EXTENSIONS

More terms from M. F. Hasler, Jan 12 2015

STATUS

approved

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Last modified January 18 05:09 EST 2020. Contains 330995 sequences. (Running on oeis4.)