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 A055651 #9 Mar 30 2022 16:29:10 %S A055651 0,1,-1,1,0,-1,1,1,-1,-1,1,2,0,-2,-1,1,3,1,-1,-3,-1,1,4,0,0,0,-4,-1,1, %T A055651 5,-7,-17,17,7,-5,-1,1,6,-28,-118,0,118,28,-6,-1,1,7,-79,-513,-399, %U A055651 399,513,79,-7,-1,1,8,-192,-1844,-2800,0,2800,1844,192,-8,-1,1,9,-431 %N A055651 Table T(m,k)=m^k-k^m (with 0^0 taken to be 1) as square array read by antidiagonals. %Y A055651 Rows A000012 (offset), A023443, A024012, A024026, A024040 and diagonals A000004, A007925, A046065, A055652. %K A055651 easy,sign,tabl %O A055651 0,12 %A A055651 _Henry Bottomley_, Jun 07 2000 %E A055651 Title corrected by _Sean A. Irvine_, Mar 30 2022