A093704 - OEIS

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A093704

Value of initial digit of n in Roman numeral representation.

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; 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`
	CROSSREFS	`Cf. A000030.` `Sequence in context: A171372 A083945 A125563 * A112110 A142864 A098598` `Adjacent sequences: A093701 A093702 A093703 * A093705 A093706 A093707`
	KEYWORD	`nonn,easy,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 17 2004`

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Last modified February 16 05:55 EST 2012. Contains 205860 sequences.