id:A081653 - OEIS Search Results

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

+0
2

1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 4, 1, 1, 1, 2, 1, 2, 1, 1, 2, 5, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 7, 1, 1, 2, 11, 1, 1, 2, 1, 1, 2, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 16, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 1 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`a(n) = GCD(A007953(n), A007605(n)).`
	EXAMPLE	`a(8) = GCD(A007953(8), A007953(A000040(8)) = GCD(8, A007953(19)) = GCD(8,1+9) = GCD(42,52) = 2.`
	CROSSREFS	`Cf. A000040, A081652, A066750.` `Sequence in context: A061916 A076348 A113310 this_sequence A096860 A128185 A022300` `Adjacent sequences: A081650 A081651 A081652 this_sequence A081654 A081655 A081656`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Mar 25 2003`

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

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