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 A049874 #8 May 27 2019 10:25:48
%S A049874 1,1,1,2,1,2,2,3,2,1,5,3,2,8,5,1,2,13,8,2,3,21,13,2,1,5,34,21,3,2,8,
%T A049874 55,34,5,1,2,13,89,55,8,2,3,21,144,89,13,2,1,5,34,233,144,21,3,2,8,55,
%U A049874 377,233,34,5,1,2,13,89,610,377,55,8,2,3,21,144,987,610,89,13,2,1
%N A049874 a(n)=b(n)-b(n-1), where b=A049862 (differences of products of Fibonacci numbers.)
%H A049874 Michel Marcus, <a href="/A049874/b049874.txt">Table of n, a(n) for n = 1..1010</a>
%o A049874 (PARI) lista(nn) = {my(out = List([0])); for (i=0, nn, for (j=i+1, nn, listput(out, fibonacci(i)*fibonacci(j)););); my(v = Vec(vecsort(select(x->(x < fibonacci(nn+1)), out), , 8))); vector(#v-1, k, v[k+1] - v[k]);} \\ _Michel Marcus_, May 27 2019
%Y A049874 Cf. A049862.
%K A049874 nonn
%O A049874 1,4
%A A049874 _Clark Kimberling_
%E A049874 More terms from _Michel Marcus_, May 27 2019