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 A160182 #14 Mar 05 2019 02:17:45 %S A160182 1,1,1,2,1,1,3,1,1,1,5,2,1,1,1,6,2,1,1,1,1,10,4,2,1,1,1,1,11,4,2,1,1, %T A160182 1,1,1,16,6,3,2,1,1,1,1,1,19,7,4,2,1,1,1,1,1,1,26,10,5,3,2,1,1,1,1,1,1 %N A160182 Triangle read by rows, 1 / ((-1)*A129184 * A051731 + I), I = Identity matrix. %C A160182 Inverse mobius transform (A051731) * the triangle shifts row terms to the right deleting the right border, getting triangle A160183: (1; 2,1; 3,1,1; 5,2,1,1;...). %F A160182 Triangle read by rows, 1 / ((-1)*A129184 * A051731 + I), I = Identity matrix. The operations shift the inverse Mobius transform (A051731) down, changing the signs to (-1), then add I = (1,1,1,...) as the right border. %e A160182 First few rows of the triangle: %e A160182 1; %e A160182 1, 1; %e A160182 2, 1, 1; %e A160182 3, 1, 1, 1; %e A160182 5, 2, 1, 1, 1; %e A160182 6, 2, 1, 1, 1, 1; %e A160182 10, 4, 2, 1, 1, 1, 1; %e A160182 11, 4, 2, 1, 1, 1, 1, 1; %e A160182 16, 6, 3, 2, 1, 1, 1, 1, 1; %e A160182 19, 7, 4, 2, 1, 1, 1, 1, 1, 1; %e A160182 26, 10, 5, 3, 2, 1, 1, 1, 1, 1, 1; %e A160182 ... %p A160182 A160182den := proc(n,k) %p A160182 a := add( A129184(n,i)*A051731(i,k),i=1..n) ; %p A160182 if n =k then %p A160182 -a+1 ; %p A160182 else %p A160182 -a; %p A160182 end if; %p A160182 end proc: %p A160182 N := 20 : %p A160182 M := Matrix(N,N) : %p A160182 for n from 1 to N do %p A160182 for k from 1 to N do %p A160182 M[n,k] := A160182den(n,k) ; %p A160182 end do: %p A160182 end do: %p A160182 MatrixInverse(M) ; # _R. J. Mathar_, Aug 04 2015 %Y A160182 Cf. A051731, A129184, A160183. %Y A160182 Row sums = A068336. Left border = A003238. %K A160182 nonn,tabl %O A160182 1,4 %A A160182 _Gary W. Adamson_, May 03 2009