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 A054734 #9 Jul 02 2025 16:01:59 %S A054734 0,24,48,80,120,144,168,224,240,288,360,440,480,504,528,624,672,720, %T A054734 728,840,864,960,1008,1080,1088,1200,1224,1320,1344,1368,1520,1584, %U A054734 1680,1728,1848,1872,2024,2160,2184,2208,2240,2400,2520,2600,2640,2808 %N A054734 Numbers of the form 2*x*(x + 1)*y*(y + 1) where x and y are distinct. %F A054734 a(n) = 2 * A053990(n). - _Sean A. Irvine_, Feb 20 2022 %Y A054734 Cf. A053990, A054731. %K A054734 nonn,easy %O A054734 1,2 %A A054734 Stuart M. Ellerstein (ellerstein(AT)aol.com), Apr 22 2000 %E A054734 More terms from _James Sellers_, Apr 22 2000