id:A107846 - OEIS Search Results

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Number of duplicate digits of n.

+0
2

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

	OFFSET	`0,1`
	FORMULA	`a(n) = A055642(n) - A043537(n).`
	EXAMPLE	`a(11) = 1 because 11 has two total decimal digits but only one distinct digit (1) and 2-1=1.` `Similarly, a(3653135) = 7 (total digits) - 4 (distinct digits: 1,3,5,6) = 3 (There are three duplicate digits here, namely, 3, 3 and 5).`
	CROSSREFS	`Cf. A055642 (Total decimal digits of n), A043537 (Distinct decimal digits of n).` `Sequence in context: A088918 A011726 A070109 this_sequence A065202 A045701 A011725` `Adjacent sequences: A107843 A107844 A107845 this_sequence A107847 A107848 A107849`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 24, 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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