A073618 Consider Pascal's triangle A007318; a(n) = LCM of terms at +45 degree slope with the horizontal.

1, 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, 2329089562800

Offset

0,4

Comments

A025560 with an a(0) defined in addition. - R. J. Mathar, Sep 23 2008

Links

Table of n, a(n) for n=0..31.

Example

The ninth diagonal is 1,7,15,10,1 and the LCM of the terms = 210 hence a(8) = 30.

Maple

a:= n-> ilcm(seq(binomial(n-i, i), i=0..floor(n/2))):
seq(a(n), n=0..35);  # Alois P. Heinz, Nov 27 2023

Crossrefs

Cf. A025560, A073617.

Sequence in context: A069062 A356017 A025560 * A247651 A305746 A221510

Adjacent sequences: A073615 A073616 A073617 * A073619 A073620 A073621

Keyword

nonn

Author

Amarnath Murthy, Aug 07 2002

Extensions

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 22 2003

Status

approved