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 A026095 #4 Mar 30 2012 18:56:04
%S A026095 1,3,6,9,22,55,153,431,1235,3555,10278,29793,86562,251983,734776,
%T A026095 2145825,6275148,18373299,53856156,158025189,464112300,1364247183,
%U A026095 4013353935,11815188003,34807249137,102606325139,302646363728,893175905781
%N A026095 a(n) = Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array defined in A026082.
%Y A026095 Equals A024998(n) + 3, n>1.
%K A026095 nonn
%O A026095 1,2
%A A026095 _Clark Kimberling_