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 A181806 #17 Feb 16 2025 08:33:13 %S A181806 1,2,4,12,24,48,120,240,360,720,5040,10080,15120,30240,60480,151200, %T A181806 166320,332640,665280,1663200,1995840,3326400,8648640,17297280, %U A181806 21621600,43243200,86486400,129729600,259459200,735134400 %N A181806 Positive integers with more highly composite divisors (A002182) than any smaller positive integer. %C A181806 Numbers n such that A181801(n) > A181801(m) for all m < n. Also, numbers n such that row n of triangles A181802 and A181803 is longer than any previous row in either triangle. %C A181806 Not a subsequence of A002182. The smallest positive integer which has a record number of highly composite divisors, but which is not highly composite itself, is 30240. %H A181806 Charles R Greathouse IV, <a href="/A181806/b181806.txt">Table of n, a(n) for n = 1..153</a> %H A181806 A. Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/highly.txt">List of the first 1200 highly composite numbers</a> %H A181806 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HighlyCompositeNumber.html">Highly composite number</a> %e A181806 12 has five divisors (namely, 1, 2, 4, 6 and 12) that are members of A002182. No positive integer smaller than 12 has more than three members of A002182 among its divisors; hence, 12 is a member of the sequence. %Y A181806 A181807(n) = number of highly composite divisors of a(n) (i.e., A181801(a(n))). %Y A181806 Subsequence of A025487, A181804. Numbers A181804(n) such that A181805(n) increases to a record. %Y A181806 Includes all members of A136253. %K A181806 nonn %O A181806 1,2 %A A181806 _Matthew Vandermast_, Nov 27 2010 %E A181806 a(20)-a(30) from _Charles R Greathouse IV_, Jan 14 2011