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 A122024 #12 Jun 18 2021 02:38:40
%S A122024 1,1,1,1,1,1,2,5,13,34,76,286,1651,10933,76130,418553,3071419,
%T A122024 37191253,597219127,11052077737,158194282219,2500524791374,
%U A122024 60075261409487,2150997470890553,103505410541423890,3957922747010968084
%N A122024 a(n) = (3*a(n - 1)a(n - 5) - a(n - 2)*a(n - 4))/a(n - 6); a(0) = 1, a(1) = 1, a(2) = 1, a(3) = 1, a(4) = 1, a(5) = 1.
%t A122024 a[n_] := a[n] = (3*a[n - 1]a[n - 5] - a[n - 2]*a[n - 4])/a[n - 6]; a[0] = 1; a[1] = 1; a[2] = 1; a[3] = 1; a[4] = 1; a[5] = 1; Table[a[n], {n, 0, 30}]
%t A122024 RecurrenceTable[{a[0]==a[1]==a[2]==a[3]==a[4]==a[5]==1,a[n]==(3a[n-1] a[n-5]- a[n-2]a[n-4])/a[n-6]},a,{n,30}] (* _Harvey P. Dale_, Nov 07 2013 *)
%Y A122024 Cf. Somos-6 sequence A006722.
%K A122024 nonn,easy
%O A122024 0,7
%A A122024 _Roger L. Bagula_, Sep 12 2006
%E A122024 Edited by _N. J. A. Sloane_, Sep 13 2006
%E A122024 Offset changed to 0 by _Georg Fischer_, Jun 18 2021