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 A381213 #6 Feb 18 2025 18:58:47 %S A381213 16,48,64,80,112,144,162,176,192,208,240,256,272,304,320,324,336,368, %T A381213 400,432,448,464,496,528,560,576,592,624,648,656,688,704,720,729,752, %U A381213 768,784,810,816,832,848,880,912,944,960,976,1008,1024,1040,1072,1088,1104 %N A381213 Numbers k such that A381201(k) != A381203(k). %H A381213 Paolo Xausa, <a href="/A381213/b381213.txt">Table of n, a(n) for n = 1..10000</a> %t A381213 A381213Q[n_] := Times @@ # != LCM @@ # & [Union[Flatten[FactorInteger[n]]]]; %t A381213 Select[Range[2000], A381213Q] %Y A381213 Cf. A381201, A381203. %K A381213 nonn,easy %O A381213 1,1 %A A381213 _Paolo Xausa_, Feb 17 2025