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 A275705 #16 Aug 12 2016 06:22:36 %S A275705 1,-2,-1,-3,-5,-6,-4,-7,-12,-18,-9,-13,-20,-32,-50,11,2,-11,-31,-63, %T A275705 -113,3,14,16,5,-26,-89,-202,6,9,23,39,44,18,-71,-273,4,10,19,42,81, %U A275705 125,143,72,-201,8,12,22,41,83,164,289,432,504,303,7,15,27,49,90 %N A275705 A variation of the Zorach additive triangle, read by rows. %C A275705 This is a variation of the Zorach additive triangle (A035312), with negative numbers included. Each term is the sum of the terms to its immediate west and northwest, and each member of the first column is chosen such that its absolute value is minimal and no term following it in its own row occurs earlier in the triangle. In the case where m and -m both satisfy these criteria for T(n,1) = |m|, choose the term that minimizes the absolute value of T(n,2). %C A275705 Is this a permutation of the nonzero integers? %H A275705 Max Barrentine, <a href="/A275705/b275705.txt">Rows n = 1..50 of triangle, flattened</a> %Y A275705 Cf. A035312. %K A275705 sign,tabl %O A275705 1,2 %A A275705 _Max Barrentine_, Aug 06 2016