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 A140699 #2 Mar 31 2012 20:38:30 %S A140699 1,2,-1,3,0,-1,2,-2,0,0,5,0,0,0,-1,1,-3,-2,0,0,1,7,0,0,0,0,0,-1,2,-2, %T A140699 0,0,0,0,0,0,3,0,-3,0,0,0,0,0,0,1,-5,0,0,-2,0,0,0,0,1,11,0,0,0,0,0,0, %U A140699 0,0,0,-1,1,-1,-2,0,0,2,0,0,0,0,0,0,13,0,0,0,0,0,0,0,0,0,0,0,-1,1,-7,0,0,0,0,-2,0,0,0,0,0,0,1,1,0,-5,0,-3,0,0,0,0,0,0,0 %N A140699 Triangle read by rows: A054524*A140256. %C A140699 Row products are A140700. Similar to table A140256. Can perhaps be seen as taking the moebius function of A126988 times the mangoldt function of A126988. %F A140699 a(n) = A054524*A140256 %e A140699 1; %e A140699 2, -1; %e A140699 3, 0, -1; %e A140699 2, -2, 0, 0; %e A140699 5, 0, 0, 0, -1; %e A140699 1, -3, -2, 0, 0, 1; %e A140699 7, 0, 0, 0, 0, 0, -1; %e A140699 2, -2, 0, 0, 0, 0, 0, 0; %e A140699 3, 0, -3, 0, 0, 0, 0, 0, 0; %e A140699 1, -5, 0, 0, -2, 0, 0, 0, 0, 1; %e A140699 11,0, 0, 0, 0, 0, 0, 0, 0, 0, -1; %Y A140699 Cf. A054524, A140256, A126988, A140700. %K A140699 sign,tabl %O A140699 1,2 %A A140699 Mats O. Granvik and _Gary W. Adamson_, May 24 2008