cp's OEIS Frontend

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.

A369151 Numbers with a record high excess of even over odd divisors; so indices of record lows in A048272.

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%I A369151 #19 Jan 20 2024 09:29:16
%S A369151 1,2,4,8,16,24,48,96,144,192,240,480,720,960,1440,2880,3360,5040,6720,
%T A369151 10080,20160,30240,40320,60480,80640,100800,110880,181440,201600,
%U A369151 221760,332640,443520,665280,887040,1108800,1330560,1995840,2217600,2661120,2882880,4324320,5765760,8648640,11531520,14414400
%N A369151 Numbers with a record high excess of even over odd divisors; so indices of record lows in A048272.
%C A369151 Every term is the product of primorials, i.e., this is a subsequence of A025487, i.e., no prime factor of any term has a lower exponent than the following prime has.
%H A369151 Keith F. Lynch, <a href="/A369151/b369151.txt">Table of n, a(n) for n = 1..48</a>
%F A369151 If n > 2, a(n) = 2*A181808(n-2) = 4*A002182(n-2).
%e A369151 24 is a term because 24 has 6 even divisors, {2,4,6,8,12,24}, and 2 odd divisors, {1,3}, giving a difference of 4, more than that of any number less than 24.
%Y A369151 Cf. A048272.
%K A369151 nonn
%O A369151 1,2
%A A369151 _Keith F. Lynch_, Jan 14 2024