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 A077052 #4 Mar 30 2012 18:57:04
%S A077052 1,0,-1,0,1,-1,0,0,0,0,0,0,1,-1,-1,0,0,0,0,0,1,0,0,0,1,0,-1,-1,0,0,0,
%T A077052 0,0,-1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,-1,-1,
%U A077052 -1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,-1,0,0,0,0,0
%N A077052 Right Moebius transformation matrix, M, by antidiagonals.
%C A077052 If S=(s(1),s(2),...) is a sequence written as a row vector, then S*M is the Moebius transform of S; i.e. its n-th term is Sum{mu(k)*s(k): k|n}. M is the transpose of the left Moebius transformation matrix, A077050.
%F A077052 M=T^(-1), where T is the right summatory matrix, A077051.
%e A077052 Northwest corner:
%e A077052 1 -1 -1 0 -1 1
%e A077052 0 1 0 -1 0 -1
%e A077052 0 0 1 0 0 -1
%e A077052 0 0 0 1 0 0
%e A077052 0 0 0 0 1 0
%e A077052 0 0 0 0 0 1
%Y A077052 Cf. A077049, A077050, A077051.
%K A077052 sign,tabl
%O A077052 1,1
%A A077052 _Clark Kimberling_, Oct 22 2002