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 A127716 #6 May 11 2014 22:41:01 %S A127716 1,1,3,11,72,473,3727,39646,412679,4765654,61015451,937386045, %T A127716 14126033578,227901084348,3941375013541,72677938745613, %U A127716 1517730017193292,31249446089387086,675658943143264102,15356377683044270187 %N A127716 a(n) = A127714(n, n*(n+1)/2). %C A127716 Triangle A127714 has (n+1)*(n+2)/2 terms in row n for n>=0. A127715 forms the rightmost border of triangle A127714. %Y A127716 Cf. A127714, A127715. %K A127716 nonn %O A127716 0,3 %A A127716 _Paul D. Hanna_, Jan 24 2007