A025560 a(n) = LCM{1, C(n-1,1), C(n-2,2), ..., C(n-[ n/2 ],[ n/2 ])}.

1, 1, 2, 3, 12, 30, 60, 210, 840, 1260, 2520, 13860, 27720, 180180, 360360, 180180, 720720, 6126120, 12252240, 116396280, 232792560, 116396280, 232792560, 2677114440, 5354228880, 13385572200, 26771144400, 40156716600, 80313433200, 1164544781400

Offset

1,3

Links

Table of n, a(n) for n=1..30.

Maple

f:=n->ilcm(seq(binomial(n-i, i), i=0..floor(n/2)));

Crossrefs

Cf. A025562.

Sequence in context: A048085 A069062 A356017 * A073618 A247651 A305746

Adjacent sequences: A025557 A025558 A025559 * A025561 A025562 A025563

Keyword

nonn

Author

Clark Kimberling

Extensions

Entry revised by N. J. A. Sloane, May 26 2005

Status

approved