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 A137713 #6 Aug 20 2018 16:47:05 %S A137713 1,2,3,5,7,12,18,30,48,78,126,205,331,536,868,1404,2272,3676,5948, %T A137713 9624,15572,25195,40767,65962,106729,172690,279419,452109,731528, %U A137713 1183637,1915165,3098802,5013967,8112769,13126737,21239506,34366243,55605749,89971992,145577742,235549734,381127476,616677210 %N A137713 Row sums of triangle A137712. %C A137713 a(n)/a(n-1) tends to phi. %H A137713 Robert Israel, <a href="/A137713/b137713.txt">Table of n, a(n) for n = 1..1000</a> %e A137713 a(6) = 12 = sum of row 6 terms of triangle A137712: (8 + 2 + 1 + 0 + 0 + 1). %p A137713 for n from 1 to 100 do %p A137713 T[n,1]:= combinat:-fibonacci(n); %p A137713 for k from 2 to n do %p A137713 if n >= 2*k-1 then T[n,k]:= T[n-1,k-1] - T[n-k,k-1] %p A137713 else T[n,k]:= T[n-1,k-1] %p A137713 fi %p A137713 od: %p A137713 od: %p A137713 seq(add(T[n,k],k=1..n),n=1..100); # _Robert Israel_, Aug 20 2018 %Y A137713 Cf. A137712. %K A137713 nonn %O A137713 1,2 %A A137713 _Gary W. Adamson_, Feb 08 2008 %E A137713 Corrected and extended by _Robert Israel_, Aug 20 2018