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A140645 Digit sums of highly composite numbers. 1
1, 2, 4, 6, 3, 6, 9, 12, 6, 3, 9, 6, 9, 9, 12, 9, 15, 9, 9, 18, 9, 9, 9, 9, 18, 18, 9, 18, 18, 18, 18, 18, 18, 18, 36, 18, 27, 18, 18, 18, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Except for the first three terms, all others are multiples of 3.

LINKS

Table of n, a(n) for n=1..41.

A. Flammenkamp, Table of 1200 Highly Composite Numbers.

Graeme McRae, Highly Composite Numbers.

EXAMPLE

2162160 is a highly composite number whose digit sum is 18.

CROSSREFS

Cf. A002182, A002183, A117825, A127390.

Sequence in context: A088178 A259840 A161184 * A327724 A117532 A287662

Adjacent sequences:  A140642 A140643 A140644 * A140646 A140647 A140648

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Jul 08 2008

STATUS

approved

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Last modified October 23 11:19 EDT 2019. Contains 328345 sequences. (Running on oeis4.)