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A093704 Value of initial digit of n in Roman numeral representation. 1
1, 1, 1, 1, 5, 5, 5, 5, 1, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..3999

Stephanus Gibbs, Roman Numeral and Date Conversion

Eric Weisstein's World of Mathematics, Roman Numerals

EXAMPLE

n=42 == XLII -> X == a(42)=10.

MAPLE

A093704 := proc(n) return convert(convert(n, roman)[1], arabic): end: seq(A093704(n), n=1..100); # Nathaniel Johnston, May 18 2011

MATHEMATICA

FromDigits[StringTake[IntegerString[Range[70], "Roman"], 1], "Roman"] (* Harvey P. Dale, Oct 10 2012 *)

CROSSREFS

Cf. A000030.

Sequence in context: A171372 A083945 A125563 * A271509 A269626 A269268

Adjacent sequences:  A093701 A093702 A093703 * A093705 A093706 A093707

KEYWORD

nonn,easy,base

AUTHOR

Reinhard Zumkeller, May 17 2004

STATUS

approved

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Last modified February 19 10:57 EST 2018. Contains 299330 sequences. (Running on oeis4.)