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A081652 Greatest common divisor of n and sum of decimal digits of n-th prime. 1
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; refs; listen; history; internal format)
OFFSET

1,6

COMMENTS

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: A025903 A175327 A101211 * A140816 A029433 A088203

Adjacent sequences:  A081649 A081650 A081651 * A081653 A081654 A081655

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 25 2003

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Last modified February 16 07:10 EST 2012. Contains 205874 sequences.