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 A281450 #8 Jan 22 2017 14:39:39 %S A281450 1,1,8,6765,190392490709135, %T A281450 20672849399056463095319772838289364792345825123228624 %N A281450 a(n) = Fibonacci(binomial(2*n,n)). %H A281450 Alois P. Heinz, <a href="/A281450/b281450.txt">Table of n, a(n) for n = 0..7</a> %F A281450 a(n) = A000045(A007318(2*n,n)) = A000045(A000984(n)). %F A281450 a(n) = A045995(n,n). %p A281450 a:= n-> (<<0|1>, <1|1>>^binomial(2*n, n))[1, 2]: %p A281450 seq(a(n), n=0..6); %Y A281450 Main diagonal of A045995. %Y A281450 Cf. A000045, A000984, A007318, A273397. %K A281450 nonn %O A281450 0,3 %A A281450 _Alois P. Heinz_, Jan 21 2017