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 A083798 #9 Mar 31 2017 21:41:54 %S A083798 0,1,2,5,4,3,13,12,9,8,23,22,21,20,10,47,46,45,44,40,18,59,58,57,56, %T A083798 55,54,21,59,58,57,56,55,54,49,32,839,838,837,836,835,834,833,832,36, %U A083798 1679,1678,1677,1676,1675,1674,1673,1672,1656,60,2519,2518,2517,2516,2515,2514,2513,2512,2511,2510,55 %N A083798 Triangle obtained by replacing each term in A083796 with the sum of all other terms in that row. %e A083798 0 %e A083798 1 2 %e A083798 5 4 3 %e A083798 13 12 9 8 %e A083798 23 22 21 20 10 %e A083798 ... %Y A083798 Cf. A083796, A083797, A083799. %K A083798 nonn,tabl %O A083798 1,3 %A A083798 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 08 2003 %E A083798 Extended and a(1) corrected by _Max Alekseyev_, Nov 04 2015