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 A112980 #20 Feb 16 2025 08:32:59
%S A112980 0,1,1,2,33,39135425,91801604643057285538237803582627026018
%N A112980 a(0) = 0, a(1) = 1; for n>=2: a(n) = a(n-1)^5 + a(n-2)^5.
%H A112980 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/QuinticEquation.html">Quintic Equation</a>
%e A112980 a(3) = 1^5 + 1^5 = 2.
%e A112980 a(4) = 1^5 + 2^5 = 33.
%e A112980 a(5) = 2^5 + 33^5 = 39135425.
%e A112980 a(6) = 33^5 + 39135425^5 = 91801604643057285538237803582627026018.
%t A112980 RecurrenceTable[{a[1]==a[2]==1,a[n]==a[n-1]^5+a[n-2]^5},a,{n,7}] (* _Harvey P. Dale_, May 01 2012 *)
%Y A112980 Cf. A000045, A000283, A112961, A112969.
%K A112980 easy,nonn
%O A112980 0,4
%A A112980 _Jonathan Vos Post_, Jan 02 2006
%E A112980 a(0)=0 prepended by _Alois P. Heinz_, Sep 15 2023