A249694 - OEIS

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A249694

a(n) = gcd(A084937(n), A084937(n+3)).

2

1, 2, 1, 1, 4, 1, 1, 2, 1, 1, 2, 1, 1, 2, 3, 1, 2, 5, 1, 2, 1, 1, 2, 1, 1, 6, 1, 1, 2, 1, 1, 2, 3, 1, 2, 3, 1, 4, 3, 1, 2, 1, 1, 2, 1, 3, 2, 1, 3, 4, 1, 1, 8, 1, 1, 6, 1, 1, 6, 1, 1, 2, 5, 1, 2, 3, 1, 4, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 4, 1, 1, 2

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OFFSET

1,2

COMMENTS

gcd(A084937(n), A084937(n+1)) = gcd(A084937(n), A084937(n+2)) = 1 by definition of A084937.

LINKS

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

PROG

(Haskell)

a249694 n = a249694_list !! (n-1)

a249694_list = zipWith gcd (drop 3 a084937_list) a084937_list

CROSSREFS

Sequence in context: A064645 A285425 A008307 * A192005 A333810 A205592

Adjacent sequences: A249691 A249692 A249693 * A249695 A249696 A249697

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 04 2014

STATUS

approved