id:A103756 - OEIS Search Results

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Number of contiguous digits i in the counting numbers, for i=2.

+0
1

1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 2, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`Write the natural numbers as an infinite sequence of digits, starting at the left; and count the digits of each group of "2"'s you encounter (the smallest "groups" have one "2").`
	EXAMPLE	`a(1)=1: the first "2" of the counting numbers, isolated.` `a(2)=1: the second "2", second digit of number 12, isolated.` `a(3)=1 the first digit of number 20, isolated.` `a(4)=1: the first digit of number 21, isolated.` `a(5)=3: two "2"'s of 22 followed by one "2" of 23 = three "2"'s, the next group of "2"'s.`
	CROSSREFS	`Sequence in context: A136093 A134108 A094404 this_sequence A103755 A093818 A097031` `Adjacent sequences: A103753 A103754 A103755 this_sequence A103757 A103758 A103759`
	KEYWORD	`nonn`
	AUTHOR	`Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Mar 28 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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