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 A156827 #4 Dec 10 2016 02:10:19 %S A156827 1,-3,-8,0,-48,112,-256,0,0,2816,-6144,0,-28672,61440,131072,0, %T A156827 -589824,0,-2621440,0,11534336,24117248,-50331648,0,0,452984832,0,0, %U A156827 -4026531840,-8321499136 %N A156827 A001792*A008683. %C A156827 Sequence appears to be a determinant of A156826 as described therein. %Y A156827 Cf. A001792, A008683, A156826. %K A156827 sign %O A156827 1,2 %A A156827 _Mats Granvik_, Feb 16 2009