id:A084904 - OEIS Search Results

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Number of places to insert a division operator in the decimal string of n such that an integer results.

+0
3

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

	OFFSET	`0,102`
	COMMENT	`a(A084906(n))>0; record values: a(A000533(n))=n; a(n)<A055642(n).`
	FORMULA	`a(n) = #{k: (n mod 10^k)>0 and ((n/10^k) mod (n mod 10^k))=0}.`
	EXAMPLE	`a(42)=1, as 4/2=2; a(43)=0, as 4/3 is not an integer.`
	CROSSREFS	`Cf. A084905.` `Sequence in context: A096809 A110515 A071936 this_sequence A097516 A112802 A118269` `Adjacent sequences: A084901 A084902 A084903 this_sequence A084905 A084906 A084907`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 10 2003`

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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