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A086334 Number of highly composite numbers having n distinct prime factors. 2
1, 2, 5, 6, 12, 11, 16, 14, 19, 21, 15, 23, 18, 17, 22, 20, 30, 23, 31, 25, 28, 33, 27, 28, 36, 27, 33, 35, 33, 36, 46, 37, 47, 36, 38, 36, 48, 43, 37, 43, 39, 40, 45, 36, 37, 36, 47, 46, 43, 43, 48, 43, 44, 47, 58, 52, 50, 51, 57, 50, 51, 56, 66, 67, 66, 67, 94, 76, 98, 74, 70, 71, 71 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

T. D. Noe, Table of n, a(n) for n = 0..4000 (using data from Flammenkamp)

A. Flammenkamp, First 1200 highly composite numbers

EXAMPLE

a(0) = 1 because there is 1 highly composite number that has no prime factors; a(9) = 21 because there are 21 highly composite numbers that have 9 distinct prime factors.

CROSSREFS

Cf. A002182.

Sequence in context: A190120 A069789 A332683 * A198331 A057518 A289206

Adjacent sequences:  A086331 A086332 A086333 * A086335 A086336 A086337

KEYWORD

nonn,look

AUTHOR

Lekraj Beedassy, Sep 01 2003

EXTENSIONS

Corrected and extended by Graeme McRae, Apr 30 2006

STATUS

approved

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Last modified May 31 02:51 EDT 2020. Contains 334747 sequences. (Running on oeis4.)