A218535 Greatest common divisor of consecutive terms in A176352.

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

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. A176352, 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