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 A095833 #7 Dec 08 2015 08:51:18 %S A095833 1,4,2,9,6,3,16,12,8,4,25,20,15,10,5,36,30,24,18,12,6,49,42,35,28,21, %T A095833 14,7,64,56,48,40,32,24,16,8,81,72,63,54,45,36,27,18,9,100,90,80,70, %U A095833 60,50,40,30,20,10,121,110,99,88,77,66,55,44,33,22,11,144,132,120,108,96,84 %N A095833 Triangle read by rows: T(n,k) = (n-k+1)*n, n>=1, 1<=k<=n. %e A095833 1 %e A095833 4 2 %e A095833 9 6 3 %e A095833 16 12 8 4 %e A095833 25 20 15 10 5 %e A095833 36 30 24 18 12 6 %e A095833 49 42 35 28 21 14 7 %e A095833 64 56 48 40 32 24 16 8 %Y A095833 Cf. A002411 (row sums). %K A095833 easy,nonn,tabl %O A095833 1,2 %A A095833 Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 10 2004