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 A286540 a(n) = gcd(A259934(n), A259934(n-1)) = A009191(A259934(n)). 4
 2, 2, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 1, 1, 1, 3, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 6, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 8, 8, 24, 18, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Antti Karttunen, Table of n, a(n) for n = 1..64800 (computed from the b-file of A259934 provided by Robert Israel) FORMULA a(n) = gcd(A259934(n), A259934(n-1)) = gcd(A259934(n), A259935(n)). a(n) = A009191(A259934(n)). PROG (Scheme) (define (A286540 n) (gcd (A259934 n) (A259934 (- n 1)))) (define (A286540 n) (gcd (A259934 n) (A259935 n))) CROSSREFS Cf. A009191, A259934, A259935. Sequence in context: A174399 A056881 A260322 * A229980 A184158 A060779 Adjacent sequences:  A286537 A286538 A286539 * A286541 A286542 A286543 KEYWORD nonn AUTHOR Antti Karttunen, May 21 2017 STATUS approved

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Last modified September 21 08:38 EDT 2020. Contains 337268 sequences. (Running on oeis4.)