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 A173094 #6 Mar 24 2023 10:21:07
%S A173094 2,3,3,6,12,60,660,38940,25661460,999231590940,25641740502411581460,
%T A173094 25622037156669717708454796390940,
%U A173094 656993627914472375437286314449293585586011019581460
%N A173094 a(1)=2, a(2)=3, a(n)=a(n-2)*a(n-1)-a(n-1).
%t A173094 a=2;b=3;lst={a,b};Do[c=a*b-b;AppendTo[lst,c];a=b;b=c,{n,13}];lst
%t A173094 RecurrenceTable[{a[1]==2,a[2]==3,a[n]==a[n-2]a[n-1]-a[n-1]},a,{n,20}] (* _Harvey P. Dale_, Oct 10 2015 *)
%Y A173094 Cf. A173093.
%K A173094 nonn
%O A173094 1,1
%A A173094 _Vladimir Joseph Stephan Orlovsky_, Feb 09 2010
%E A173094 Definition corrected by _Harvey P. Dale_, Oct 10 2015