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 A124842 #8 Apr 25 2016 13:18:26 %S A124842 1,1,-1,1,-2,2,1,-3,6,-3,1,-4,12,-12,3,1,-5,20,-30,15,0,1,-6,30,-60, %T A124842 45,0,-10,1,-7,42,-105,105,0,-70,35,1,-8,56,-168,210,0,-280,280,-90 %N A124842 Triangle, row sums = A005614, the rabbit sequence. %F A124842 Binomial transform of the infinite matrix with the diagonalized sequence A124841. %e A124842 First few rows of the triangle are: %e A124842 1; %e A124842 1, -1; %e A124842 1, -2, 2; %e A124842 1, -3, 6, -3; %e A124842 1, -4, 12, -12, 3; %e A124842 1, -5, 20, -30, 15, 0; %e A124842 1, -6, 30, -60, 45, 0, -10; %e A124842 ... %e A124842 4th term of the rabbit sequence (1, 0, 1, 1, 0...) = 1 = sum of row 4 terms: (1, - 3 + 6 - 3). %Y A124842 Cf. A124841. %K A124842 sign,tabl %O A124842 1,5 %A A124842 _Gary W. Adamson_, Nov 10 2006