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 A264932 #13 Sep 08 2022 08:46:14
%S A264932 1,3,3,7625597484987
%N A264932 a(1) = 1, a(2) = 3, a(n)= H_4(a(n-1),a(n-2)).
%C A264932 See A054871 for definitions and key links.
%C A264932 Possible other sequence with the same 4 entries:
%C A264932 a(1)=1;
%C A264932 a(2)= 3;
%C A264932 a(n)=a(n-1)^a(n-2)^a(n-2);
%t A264932 RecurrenceTable[{a[1]==1, a[2]==3, a[n]==a[n-1]^a[n-2]^a[n-2]}, a, {n, 4}] (* _Vincenzo Librandi_, Dec 17 2015 *)
%o A264932 (Magma) I:=[1,3]; [n le 2 select I[n] else Self(n-1)^Self(n-2)^Self(n-2): n in [1..5]]; // _Vincenzo Librandi_, Dec 17 2015
%K A264932 nonn
%O A264932 1,2
%A A264932 _Natan Arie Consigli_, Dec 16 2015