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 A152830 #8 May 03 2017 23:51:25
%S A152830 1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,2,1,1,2,1,1,2,1,1,3,3,1,1,3,3,1,1,3,
%T A152830 3,1,1,3,3,1,1,4,6,4,1,1,4,6,4,1,1,4,6,4,1,1,4,6,4,1,1,5,10,10,5,1,1,
%U A152830 5,10,10,5,1,1,5,10,10,5,1,1,5,10,10,5,1,1,6,15,20,15,6,1,1,6,15,20,15,6,1,1
%N A152830 Triangle read by rows, A007318 rows repeated four times .
%C A152830 Diagonal sums : A103372 .
%H A152830 G. C. Greubel, <a href="/A152830/b152830.txt">Table of n, a(n) for the first 50 rows, flattened</a>
%e A152830 Triangle begins : 1 ; 1 ; 1 ; 1 ; 1,1 ; 1,1 ; 1,1 ; 1,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,2,1 ; 1,3,3,1 ; ...
%t A152830 Flatten[Table[#,{4}]&/@Table[Binomial[n,k],{n,0,6},{k,0,n}]] (* _Harvey P. Dale_, Sep 23 2015 *)
%Y A152830 Cf. A007318, A152198, A152815, A152828.
%K A152830 easy,nonn,tabf
%O A152830 0,14
%A A152830 _Philippe Deléham_, Dec 13 2008