1,1

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

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

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

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

Sequence in context: A136004 A248864 A134299 * A021223 A206291 A058979

Adjacent sequences: A112777 A112778 A112779 * A112781 A112782 A112783

nonn,look,base

Ray Chandler, Nov 11 2005

approved