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A073618 Consider Pascal's triangle A007318; a(n) = LCM of terms at +45 degree slope with the horizontal. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

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

LINKS

Table of n, a(n) for n=0..29.

EXAMPLE

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

CROSSREFS

Cf. A073617.

Sequence in context: A195913 A048085 A069062 * A025560 A247651 A305746

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

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Last modified November 24 07:53 EST 2020. Contains 338607 sequences. (Running on oeis4.)