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 A174854 #2 Mar 30 2012 18:53:09 %S A174854 1,-1,1,-1,0,1,1,-1,0,1,-1,0,0,0,1,1,-1,-1,0,0,1,-1,0,0,0,0,0,1,-1,0, %T A174854 0,-1,0,0,0,1,1,0,-1,0,0,0,0,0,1,1,-1,0,0,-1,0,0,0,0,1,-1,0,0,0,0,0,0, %U A174854 0,0,0,1,-1,1,0,-1,0,-1,0,0,0,0,0,1,-1,0,0,0,0,0,0,0,0,0,0,0,1,1,-1,0,0,0,0 %N A174854 Triangle T(n,k) read by rows. Matrix inverse of A174852. %C A174854 First column equals A008836. The rest of the table equals A054525. %e A174854 Table begins: %e A174854 .1 %e A174854 -1..1 %e A174854 -1..0..1 %e A174854 .1.-1..0..1 %e A174854 -1..0..0..0..1 %e A174854 .1.-1.-1..0..0..1 %e A174854 -1..0..0..0..0..0..1 %e A174854 -1..0..0.-1..0..0..0..1 %e A174854 .1..0.-1..0..0..0..0..0..1 %e A174854 .1.-1..0..0.-1..0..0..0..0..1 %Y A174854 Cf. A008836, A174852. %K A174854 sign,tabl %O A174854 1,1 %A A174854 _Mats Granvik_, Mar 31 2010