A025543 Least common multiple of the first n composite numbers.

1, 4, 12, 24, 72, 360, 360, 2520, 2520, 5040, 5040, 5040, 5040, 55440, 55440, 277200, 3603600, 10810800, 10810800, 10810800, 21621600, 21621600, 367567200, 367567200, 367567200, 6983776800, 6983776800, 6983776800, 6983776800, 6983776800

Offset

0,2

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..1000

Index to divisibility sequences

Mathematica

Table[Apply[LCM, Take[Select[Range[2, 300], !PrimeQ[#] &], n]], {n, 1, 100}]  (* Clark Kimberling, Nov 12 2016 *)

Prog

(Haskell)
a025543 n = a025543_list !! n
a025543_list = scanl lcm 1 a002808_list
-- Reinhard Zumkeller, Nov 10 2013

Crossrefs

Differs from A003418 and A051451

Cf. A002808, A003418, A051451, A064354.

Cf. A036691.

Sequence in context: A318610 A296358 A282512 * A064354 A199903 A218034

Adjacent sequences: A025540 A025541 A025542 * A025544 A025545 A025546

Keyword

nonn

Author

Clark Kimberling

Status

approved