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A085914 Group the natural numbers so that the product of the terms of the n-th group is divisible by n!: (1),(2),(3,4),(5,6,7,8),(9,10,11,12),(13,14,15,16,17,18),(19,20,21,22,23,24),... Sequence contains the number of terms in each group. 4
1, 1, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14, 16, 16, 18, 18, 20, 20, 22, 22, 24, 24, 26, 26, 28, 28, 30, 30, 32, 32, 34, 34, 36, 36, 38, 38, 40, 40, 42, 42, 44, 44, 46, 46, 48, 48, 50, 50, 52, 52, 54, 54, 56, 56, 58, 58, 58, 58, 62, 63, 63, 62, 66, 64, 68, 68, 68, 70, 66 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(n) <= n.

This sequence may be related to the smoothing sequence suggested in A138023. - Enoch Haga, Feb 28 2008

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1000

CROSSREFS

Cf. A085912, A085913, A085915.

Cf. A138023.

Sequence in context: A111650 A156686 A210466 * A211390 A014684 A113638

Adjacent sequences: A085911 A085912 A085913 * A085915 A085916 A085917

KEYWORD

nonn

AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 10 2003

EXTENSIONS

More terms from Ray Chandler, Sep 15 2003

STATUS

approved

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Last modified January 27 10:42 EST 2023. Contains 359838 sequences. (Running on oeis4.)