id:A081652 - OEIS Search Results

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Greatest common divisor of n and sum of decimal digits of n-th prime.

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1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 7, 1, 8, 1, 1, 1, 4, 1, 2, 1, 1, 1, 2, 1, 4, 1, 5, 1, 1, 11, 1, 7, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 11, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 8, 1, 1, 1, 4, 1, 2, 1, 8, 1, 2, 1, 10, 1, 17, 1, 4 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`a(n) = GCD(n, A007605(n)).`
	EXAMPLE	`a(16) = GCD(16, A007953(A000040(16)) = GCD(16, A007953(53)) = GCD(16,5+3) = GCD(8*2,8) = 8.`
	CROSSREFS	`Cf. A000040, A007953, A081653, A066750.` `Sequence in context: A084217 A025903 A101211 this_sequence A140816 A029433 A088203` `Adjacent sequences: A081649 A081650 A081651 this_sequence A081653 A081654 A081655`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 25 2003`

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

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