id:A083889 - OEIS Search Results

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Number of divisors of n with largest digit = 2 (base 10).

+0
11

0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 1, 2, 0, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 2, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 3, 0, 1, 1, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 1 (list; graph; listen)

	OFFSET	`1,12`
	COMMENT	`a(n) = A000005(n) - A083888(n) - A083890(n) - A083891(n) - A083892(n) - A083893(n) - A083894(n) - A083895(n) - A083896(n) = A083897(n) - A083888(n).`
	EXAMPLE	`n=120, 4 of the 16 divisors of 120 have largest digit =2:` `{2,12,20,120}, therefore a(120)=4.`
	CROSSREFS	`Cf. A054055, A000005, A083897.` `Sequence in context: A152140 A104975 A106404 this_sequence A127523 A116927 A137276` `Adjacent sequences: A083886 A083887 A083888 this_sequence A083890 A083891 A083892`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 08 2003`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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