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 A152847 #6 May 03 2017 23:52:01
%S A152847 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,
%T A152847 2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,
%U A152847 3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,4,6,4,1,1,4,6,4,1,1,4,6,4,1
%N A152847 Triangle read by rows, A007318 rows repeated nine times .
%C A152847 Diagonal sums : A103377 .
%e A152847 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 ; 1,2,1 ; 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 A152847 Flatten[Table[#, {9}] & /@ Table[Binomial[n, k], {n, 0, 10}, {k, 0, n}]] (* _G. C. Greubel_, May 03 2017 *)
%Y A152847 Cf. A007318, A152198, A152815, A152828, A152830, A152831, A152844, A152845, A152846.
%K A152847 easy,nonn,tabf
%O A152847 0,29
%A A152847 _Philippe Deléham_, Dec 14 2008