id:A161915 - OEIS Search Results

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A161915

Digital root of Ramanujan primes (A104272).

+0
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2, 2, 8, 2, 5, 2, 5, 4, 8, 7, 2, 8, 1, 5, 7, 5, 8, 1, 2, 4, 8, 5, 7, 2, 8, 2, 1, 5, 5, 7, 7, 4, 5, 4, 5, 8, 1, 7, 2, 1, 5, 8, 2, 4, 2, 8, 5, 7, 4, 2, 4, 8, 5, 2, 2, 8, 7, 1, 4, 4, 8, 2, 4, 8, 7, 2, 8, 1, 5, 2, 4, 2, 1, 2, 4, 5, 5, 7, 8, 1, 7, 2, 8, 5, 8, 2, 8, 2, 5, 7, 8, 2, 1, 5, 8, 5, 1, 5, 7, 8, 7, 2, 5, 2, 4 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`It is interesting to note that these primes do not have 3,6 or 9 as the digital root. According to Wolfram Alpha analysis of this sequence, the cumulative sum is linear with n.`
	LINKS	`Eric W. Weisstein, Ramanujan Prime`
	EXAMPLE	`659 is a Ramanujan's prime whose digital root is 2.`
	CROSSREFS	`A104272` `Sequence in context: A037300 A029623 A046644 this_sequence A011147 A098818 A092694` `Adjacent sequences: A161912 A161913 A161914 this_sequence A161916 A161917 A161918`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jun 22 2009`
	EXTENSIONS	`a(53) corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 08 2009`

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

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