A083891 - OEIS

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A083891

Number of divisors of n with largest digit = 4 (base 10).

0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 2, 1, 2, 1, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,24`
	COMMENTS	`a(n) = A000005(n) - A083888(n) - A083889(n) - A083890(n) - A083892(n) - A083893(n) - A083894(n) - A083895(n) - A083896(n) = A083899(n) - A083898(n).`
	EXAMPLE	`n=120, 3 of the 16 divisors of 120 have largest digit =4:` `{4,24,40}, therefore a(120)=3.`
	CROSSREFS	`Cf. A054055, A000005, A083899.` `Sequence in context: A130207 A167688 A083914 * A087623 A036274 A047753` `Adjacent sequences: A083888 A083889 A083890 * A083892 A083893 A083894`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 08 2003`

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Last modified February 16 08:13 EST 2012. Contains 205893 sequences.