A119634 a(n) = lcm(1,...,2n+2)/2.

1, 6, 30, 420, 1260, 13860, 180180, 360360, 6126120, 116396280, 116396280, 2677114440, 13385572200, 40156716600, 1164544781400, 72201776446800, 72201776446800, 72201776446800, 2671465728531600, 2671465728531600

Offset

0,2

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..1000

Vaclav Kotesovec, Plot of log(a(n))/n for n = 1..10000

Mathematica

Table[LCM @@ Range[2*n + 2]/2, {n, 0, 20}] (* Vaclav Kotesovec, Mar 04 2019 *)

Prog

(GAP) List([0..20], n->Lcm(List([1..2*n+2]))/2); # Muniru A Asiru, Mar 04 2019
(PARI) {a(n) = lcm(vector(2*n+2, i, i))/2}; \\ G. C. Greubel, Mar 05 2019
(Magma) [LCM([1..2*n+2])/2: n in [0..20]]; // G. C. Greubel, Mar 05 2019
(Sage) [lcm(range(1, 2*n+3))/2 for n in (0..20)] # G. C. Greubel, Mar 05 2019

Crossrefs

Cf. A003418.

Column k=0 of A120101.

Sequence in context: A201135 A369135 A111876 * A256545 A349981 A075591

Adjacent sequences: A119631 A119632 A119633 * A119635 A119636 A119637

Keyword

nonn

Author

Paul Barry, Jun 09 2006

Status

approved