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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.)