id:A161751 - OEIS Search Results

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Digital root of Abelian numbers (A051532).

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1, 2, 3, 4, 5, 7, 9, 2, 4, 6, 8, 1, 5, 7, 2, 4, 6, 8, 1, 5, 7, 9, 2, 4, 6, 8, 5, 7, 2, 4, 6, 8, 1, 5, 7, 2, 4, 6, 8, 1, 5, 7, 9, 2, 4, 8, 1, 5, 7, 2, 4, 6, 1, 5, 7, 2, 4, 6, 8, 1, 5, 7, 9, 4, 6, 8 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`It is interesting to observe that it is difficult to find 3 as the digital root. According to Wolfram Alpha analysis of this sequence, the cumulative sum is linear with n.`
	EXAMPLE	`161 is an Abelian number whose digital root is 8.`
	CROSSREFS	`Cf. A051532` `Sequence in context: A030290 A099088 A029447 this_sequence A105362 A117331 A080612` `Adjacent sequences: A161748 A161749 A161750 this_sequence A161752 A161753 A161754`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jun 17 2009`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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