This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A112780 #13 Feb 16 2025 08:32:59
%S A112780 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,
%T A112780 13,13,13,12,13,11,14,13,13,12,13,15,13,14,13,14,13,13,15,12,14,13,17,
%U A112780 14,16,16,15,17,15,19,15,18,15,16,17,16,17,16,15,19,15,19,14,18,14,19,17
%N A112780 Number of highly composite numbers (definition 1, A002182) with n decimal digits.
%H A112780 Amiram Eldar, <a href="/A112780/b112780.txt">Table of n, a(n) for n = 1..10000</a>
%H A112780 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HighlyCompositeNumber.html">Highly Composite Number</a>
%H A112780 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/highly.txt">First 1200 highly composite numbers</a>
%F A112780 First differences of A112781. - _Amiram Eldar_, Jul 02 2019
%e A112780 a(1) = 4 since there are four highly composite numbers with one decimal digit {1,2,4,6}.
%Y A112780 Cf. A002182, A002183, A108602, A112778, A112779, A112781.
%K A112780 nonn,look,base
%O A112780 1,1
%A A112780 _Ray Chandler_, Nov 11 2005