A233287 a(n) = lcm_{i=1..n} A001177(i); partial LCM-products of Fibonacci entry points.

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).

Links

Antti Karttunen, Table of n, a(n) for n = 1..1024

Index entries for sequences related to lcm's

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

Adjacent sequences: A233284 A233285 A233286 * A233288 A233289 A233290

Keyword

nonn

Author

Antti Karttunen, Dec 13 2013

Status

approved