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URL: https://oeis.org/A233287

⇱ A233287 - OEIS

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A233287
a(n) = lcm_{i=1..n} A001177(i); partial LCM-products of Fibonacci entry points.
4
1, 3, 12, 12, 60, 60, 120, 120, 120, 120, 120, 120, 840, 840, 840, 840, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 12600, 239400, 239400, 239400, 239400, 239400, 239400, 2633400
OFFSET
1,2
COMMENTS
From n=3 onward it seems that lcm_{i=1..n} A001175(i) = 2*a(n).
FORMULA
a(1)=1, and for n > 1, a(n) = lcm(A001177(n), a(n-1)).
a(n) = lcm_{i=1..n} A001177(i). [the least common multiple of all terms from A001177(1) to A001177(n)]
PROG
(Scheme) ;; With memoizing definec-macro from Antti Karttunen's IntSeq-library.
(definec (A233287 n) (if (< n 2) 1 (lcm (A001177 n) (A233287 (- n 1)))))
CROSSREFS
Records occur at A233282. Cf. also A233283, A233284, A233285, A001175..A001177, A035105.
Sequence in context: A085060 A340354 A263672 * A214528 A217763 A234749
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 13 2013
STATUS
approved