A083890 - OEIS

This site is supported by donations to The OEIS Foundation.

A083890

Number of divisors of n with largest digit = 3 (base 10).

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

	OFFSET	`1,30`
	COMMENTS	`a(n) = A000005(n) - A083888(n) - A083889(n) - A083891(n) - A083892(n) - A083893(n) - A083894(n) - A083895(n) - A083896(n) = A083898(n) - A083897(n).`
	EXAMPLE	`n=132, 3 of the 12 divisors of 132 have largest digit =3:` `{3,33,132}, therefore a(132)=3.`
	CROSSREFS	`Cf. A054055, A000005, A083898.` `Sequence in context: A105816 A062979 A114781 * A000989 A132401 A104273` `Adjacent sequences: A083887 A083888 A083889 * A083891 A083892 A083893`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 08 2003`

Content is available under The OEIS End-User License Agreement .

Last modified February 13 08:12 EST 2012. Contains 205451 sequences.