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 A156755 #17 Mar 04 2024 01:09:38
%S A156755 1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,
%T A156755 2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,
%U A156755 2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2,2,2,3,1,1,2,1,1,2
%N A156755 Period 9: repeat 1,1,2,1,1,2,2,2,3.
%F A156755 G.f.: (1 + x + 2*x^2 + x^3 + x^4 + 2*x^5 + 2*x^6 + 2*x^7 + 3*x^8)/((1-x)*(1+x+x^2)*(x^6+x^3+1)). - _R. J. Mathar_, Mar 06 2009
%t A156755 PadRight[{},105,{1,1,2,1,1,2,2,2,3}] (* _Harvey P. Dale_, Nov 01 2011 *)
%Y A156755 Suggested by A090822.
%K A156755 nonn,easy
%O A156755 0,3
%A A156755 _Paul Curtz_, Feb 15 2009
%E A156755 More periods from _R. J. Mathar_, Mar 06 2009