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A218535 Greatest common divisor of consecutive terms in A176352. 4
1, 2, 3, 3, 4, 4, 5, 5, 15, 9, 3, 5, 5, 25, 35, 14, 7, 7, 8, 4, 7, 7, 7, 14, 42, 42, 30, 18, 8, 16, 20, 10, 25, 45, 27, 27, 33, 11, 11, 11, 33, 33, 33, 24, 6, 9, 9, 12, 15, 15, 21, 21, 42, 66, 36, 108, 117, 13, 65, 91, 91, 91, 13, 13, 39, 33, 22, 22, 11, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = gcd(A176352(n),A176352(n+1)).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

import Data.Ratio ((%), numerator, denominator)

a218535 n = a218535_list !! (n-1)

a218535_list = zipWith gcd a176352_list $ tail a176352_list

-- .

CROSSREFS

Cf. A218533, A218534.

Sequence in context: A268060 A084242 A182281 * A306592 A319246 A280026

Adjacent sequences:  A218532 A218533 A218534 * A218536 A218537 A218538

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 10 2012

STATUS

approved

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Last modified September 28 22:34 EDT 2021. Contains 347717 sequences. (Running on oeis4.)