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 A112781 #14 Feb 16 2025 08:32:59
%S A112781 4,9,15,20,29,38,47,56,66,76,86,95,106,117,125,135,146,156,167,177,
%T A112781 186,196,209,219,231,241,254,267,280,292,305,316,330,343,356,368,381,
%U A112781 396,409,423,436,450,463,476,491,503,517,530,547,561,577,593,608,625,640
%N A112781 Number of highly composite numbers (definition 1, A002182) < 10^n.
%H A112781 Amiram Eldar, <a href="/A112781/b112781.txt">Table of n, a(n) for n = 1..10000</a>
%H A112781 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HighlyCompositeNumber.html">Highly Composite Number</a>
%H A112781 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/highly.txt">First 1200 highly composite numbers</a>
%F A112781 Partial sums of A112780. - _Lekraj Beedassy_, Sep 02 2006
%e A112781 a(1) = 4 since there are four highly composite numbers < 10^1 {1,2,4,6}.
%Y A112781 Cf. A002182, A002183, A108602, A112778, A112779, A112780.
%K A112781 nonn
%O A112781 1,1
%A A112781 _Ray Chandler_, Nov 11 2005