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A071224 LCM of n and n-th composite number. 1
4, 6, 24, 36, 10, 12, 14, 120, 144, 90, 220, 84, 286, 168, 75, 208, 459, 252, 570, 160, 231, 374, 805, 72, 950, 78, 1080, 84, 1276, 90, 1426, 96, 1617, 850, 1785, 468, 1998, 2090, 2184, 2280, 2378, 420, 2666, 2772, 2880, 2990, 3102, 816, 3381 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) = n*A002808(n)/A064814(n). - Lior Manor Jun 02 2002

EXAMPLE

a(10)=90 as 18 is the 10th composite number and 10*18/gcd(10,18)=10*18/2=90.

CROSSREFS

Sequence in context: A326233 A087784 A174197 * A305381 A164532 A098660

Adjacent sequences:  A071221 A071222 A071223 * A071225 A071226 A071227

KEYWORD

nonn

AUTHOR

Amarnath Murthy, May 17 2002

EXTENSIONS

More terms from Reinhard Zumkeller, May 28 2002

More terms from Lior Manor Jun 02 2002

STATUS

approved

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Last modified June 1 09:27 EDT 2020. Contains 334759 sequences. (Running on oeis4.)