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 A099608 #11 Jan 15 2018 05:08:36 %S A099608 1,1,1,1,3,1,1,5,7,1,1,7,19,13,1,1,9,37,55,21,1,1,11,61,147,131,31,1, %T A099608 1,13,91,309,471,271,43,1,1,15,127,561,1251,1281,505,57,1,1,17,169, %U A099608 923,2751,4251,3067,869,73,1,1,19,217,1415,5321,11253,12559,6637,1405,91,1 %N A099608 Table of crystal ball sequences for A_n lattices read by antidiagonals. %C A099608 Rows (n=0..10) are A000012, A005408, A003215, A005902, A008384, A008386, A008388, A008390, A008392, A008394, A008396. %C A099608 Row reverse of A108625. - _Peter Bala_, Jul 18 2008 %F A099608 T(n, k)=hypergeom([n+1, -n, -k], [1, 1], 1). %o A099608 (PARI) T(n,k)=sum(j=0,min(n,k),binomial(n+j,j)*binomial(n,j)*binomial(k,j)) %Y A099608 T(n, n)=A005258(n), T(2n, n)=A099601(n). %Y A099608 Cf. A108625. %K A099608 nonn,tabl %O A099608 0,5 %A A099608 _Michael Somos_, Oct 25 2004