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 A038794 #9 Aug 12 2013 12:26:44 %S A038794 1,5,12,21,34,55,88,138,211,314,455,643,888,1201,1594,2080,2673,3388, %T A038794 4241,5249,6430,7803,9388,11206,13279,15630,18283,21263,24596,28309, %U A038794 32430,36988,42013,47536,53589,60205,67418,75263 %N A038794 T(n,n-4), array T as in A038792. %F A038794 For n >= 7, a(n) = (n^4-18*n^3+143*n^2-486*n+672)/24. %F A038794 a(n) = sum(A007318(n-k, k), k=0..4), n >= 7. - _Johannes W. Meijer_, Aug 11 2013 %K A038794 nonn %O A038794 4,2 %A A038794 _Clark Kimberling_, May 02 2000