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A112780 Number of highly composite numbers (definition 1, A002182) with n decimal digits. 5
4, 5, 6, 5, 9, 9, 9, 9, 10, 10, 10, 9, 11, 11, 8, 10, 11, 10, 11, 10, 9, 10, 13, 10, 12, 10, 13, 13, 13, 12, 13, 11, 14, 13, 13, 12, 13, 15, 13, 14, 13, 14, 13, 13, 15, 12, 14, 13, 17, 14, 16, 16, 15, 17, 15, 19, 15, 18, 15, 16, 17, 16, 17, 16, 15, 19, 15, 19, 14, 18, 14, 19, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Highly Composite Number

A. Flammenkamp, First 1200 highly composite numbers

FORMULA

First differences of A112781. - Amiram Eldar, Jul 02 2019

EXAMPLE

a(1) = 4 since there are four highly composite numbers with one decimal digit {1,2,4,6}.

CROSSREFS

Cf. A002182, A002183, A108602, A112778, A112779, A112781.

Sequence in context: A136004 A248864 A134299 * A021223 A206291 A058979

Adjacent sequences:  A112777 A112778 A112779 * A112781 A112782 A112783

KEYWORD

nonn,look,base

AUTHOR

Ray Chandler, Nov 11 2005

STATUS

approved

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Last modified November 13 04:20 EST 2019. Contains 329085 sequences. (Running on oeis4.)