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 A108497 #3 Mar 30 2012 18:51:39 %S A108497 0,0,0,0,2,0,0,2,0,0,0,2,1,2,0,0,0,0,0,0,0,0,2,6,5,6,2,0,0,6,0,4,0,2, %T A108497 0,0,0,5,6,0,8,3,0,2,0,0,6,4,0,0,0,6,4,0,0,0,2,6,1,9,8,9,1,6,2,0,0,6, %U A108497 0,0,0,6,0,0,0,6,0,0,0,2,6,12,7,4,3,4,7,12,6,2,0,0,6,10,4,8,0,0,0,6,10,4,8 %N A108497 Triangle read by rows: T(n,k) = k^(n+1)-k mod n, showing 1<=k<=n. %F A108497 T(n, k+n)=T(n, k). T(n, 0)=T(n, 1)=T(n, n)=T(1, k)=T(2, k)=T(6, k)=T(42, k)=T(1806, k)=0. %e A108497 Rows start: 0; 0,0; 0,2,0; 0,2,0,0; 0,2,1,2,0; 0,0,0,0,0,0; 0,2,6,5,6,2,0; etc. %e A108497 T(7,3) = 3^(7+1)-3 mod 7 = 6558 mod 7 = 6. %Y A108497 Cf. A014117, A108495, A108496, A108498, A108499. %K A108497 nonn,tabl %O A108497 1,5 %A A108497 _Henry Bottomley_, Jun 06 2005