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 A127246 #6 Aug 04 2023 04:35:11
%S A127246 1,2,3,1,2,1,1,2,3,1,1,2,1,2,3,1,2,1,1,2,1,2,3,1,1,2,3,1,2,1,1,2,3,1,
%T A127246 1,2,1,2,3,1,1,2,3,1,2,1,1,2,1,2,3,1,2,1,1,2,3,1,1,2,1,2,3,1,2,1,1,2,
%U A127246 1,2,3,1,1,2,3,1,2,1,1,2,1,2,3,1,2,1,1
%N A127246 Row sums of a Thue-Morse related triangle.
%F A127246 a(n) = Sum_{k=0..n} Product_{j=0..n-k-1} A010060(n-j).
%t A127246 a[n_] := Sum[Product[ThueMorse[i], {i, k+1, n}], {k, 0, n}]; Array[a, 100, 0] (* _Amiram Eldar_, Aug 04 2023 *)
%Y A127246 Row sums of A127247.
%Y A127246 Cf. A010060.
%K A127246 easy,nonn
%O A127246 0,2
%A A127246 _Paul Barry_, Jan 10 2007
%E A127246 More terms from _Amiram Eldar_, Aug 04 2023