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 A143446 #8 Jun 05 2023 07:07:29 %S A143446 1,0,2,-1,2,4,-1,0,4,8,-2,0,4,8,16,-1,-2,0,8,16,32,-2,-2,0,8,16,32,64, %T A143446 -2,-2,0,0,16,32,64,128,-2,-2,-4,0,16,32,64,128,256,-1,-4,-4,0,0,32, %U A143446 64,128,256,512,-2,-4,-4,0,0,32,64,128,256,512,1024,-2,-2,-4,-8,0,0,64,128,256,512,1024,2048 %N A143446 Triangle read by rows: A000012 * A143424. %C A143446 Row sums = A085945: (1, 2, 5, 11, 26, 53, 116, ...). %e A143446 First few rows of the triangle: %e A143446 1; %e A143446 0, 2; %e A143446 -1, 2, 4; %e A143446 -1, 0, 4, 8; %e A143446 -2, 0, 4, 8, 16; %e A143446 -1, -2, 0, 8, 16, 32; %e A143446 -2, -2, 0, 8, 16, 32, 64; %e A143446 ... %Y A143446 Cf. A085945, A143424. %K A143446 tabl,sign %O A143446 1,3 %A A143446 _Gary W. Adamson_, Aug 15 2008 %E A143446 a(37) = -2 corrected and more terms from _Georg Fischer_, Jun 05 2023