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 A152831 #6 May 03 2017 23:51:33
%S A152831 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,2,1,1,2,1,1,2,1,1,2,1,1,3,3,1,
%T A152831 1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,4,6,4,1,1,4,6,4,1,1,4,6,4,1,1,4,6,
%U A152831 4,1,1,4,6,4,1,1,5,10,10,5,1,1,5,10,10,5,1,1,5,10,10,5,1,1,5,10,10,5,1,1,5
%N A152831 Triangle read by rows, A007318 repeated five times .
%C A152831 Diagonal sums : A103373 .
%H A152831 G. C. Greubel, <a href="/A152831/b152831.txt">Table of n, a(n) for the first 50 rows, flattened</a>
%e A152831 Triangle begins : 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 ; 1,3,3,1 ; ...
%t A152831 Flatten[Table[#, {5}] & /@ Table[Binomial[n, k], {n,0,10}, {k, 0, n}]] (* _G. C. Greubel_, May 03 2017 *)
%Y A152831 Cf. A007318, A152198, A152815, A152828, A152830.
%K A152831 easy,nonn,tabf
%O A152831 0,17
%A A152831 _Philippe Deléham_, Dec 13 2008