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 A152851 #6 May 05 2017 02:50:20
%S A152851 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
%T A152851 1,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,
%U A152851 1,1,2,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1
%N A152851 Triangle read by rows, A007318 rows repeated twelve times .
%C A152851 Diagonal sums : A103380 .
%e A152851 Triangle begins : 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,3,3,1 ; ...
%t A152851 Flatten[Table[#, {12}] & /@ Table[Binomial[n, k], {n, 0, 10}, {k, 0, n}]] (* _G. C. Greubel_, May 04 2017 *)
%Y A152851 Cf. A007318, A152198, A152815, A152828, A152830, A152831, A152844, A152845, A152846, A152847, A152848, A152849
%K A152851 easy,nonn,tabf
%O A152851 0,38
%A A152851 _Philippe Deléham_, Dec 14 2008