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 A181817 #13 Jul 07 2019 13:36:07 %S A181817 1,2,4,12,8,24,16,48,360,32,144,96,720,64,288,192,1440,128,576,4320, %T A181817 384,75600,1728,2880,256,1152,8640,768,151200,3456,5760,512,2304, %U A181817 17280,1536,302400,6912,129600,11520,1024,51840,4608,907200,20736,34560,3072,604800,13824,259200,23040,2048 %N A181817 a(n) is the smallest integer that, when divided by any divisor of A025487(n), yields a member of A025487. %C A181817 A permutation of A181818. %H A181817 Amiram Eldar, <a href="/A181817/b181817.txt">Table of n, a(n) for n = 1..10000</a> %F A181817 If A025487(n) = Product prime(i)^e(i), then a(n) = Product A002110(i)^e(i). I.e., a(n) = A108951(A025487(n)). %F A181817 If A025487(n) = Product A002110(i)^e(i), then a(n) = Product A006939(i)^e(i). %F A181817 a(n) = A025487(n) * A181816(n). %e A181817 For any divisor d of 6 (d = 1, 2, 3, 6), 12/d (12, 6, 4, 2) is always a member of A025487. 12 is the smallest number with this relationship to 6; therefore, since 6 = A025487(4), a(4) = 12. %Y A181817 Cf. A025487, A108951, A181816, A181818. %K A181817 nonn %O A181817 1,2 %A A181817 _Matthew Vandermast_, Nov 30 2010