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 A273981 #40 Oct 07 2017 07:27:24 %S A273981 1,4,26,56,98,152,218,296,386,488,602,728,866,1016,1178,1352,1538, %T A273981 1736,1946,2168,2402,2648,2906,3176,3458,3752,4058,4376,4706,5048, %U A273981 5402,5768,6146,6536,6938,7352,7778,8216,8666,9128,9602,10088 %N A273981 Erroneous version of A005897. %F A273981 a(n) = 6*n^2 - 12*n + 8 = A005897(n-1) for n > 2. %F A273981 a(n) = n^3 - (n-2)^3 for n > 2. - _Joerg Arndt_, Jun 06 2016 %K A273981 dead %O A273981 1,2 %A A273981 _Sébastien Dumortier_, Jun 05 2016