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 A106253 #18 Feb 24 2024 01:10:57
%S A106253 2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,
%T A106253 3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,
%U A106253 2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2,1,3,1,2,2,2
%N A106253 First difference of A106252.
%C A106253 It appears that this sequence is periodic with period 6.
%H A106253 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 0, 1, 1).
%t A106253 LinearRecurrence[{-1, 0, 1, 1},{2, 2, 2, 1},105] (* _Ray Chandler_, Aug 26 2015 *)
%Y A106253 Cf. A106252.
%Y A106253 Cf. A083039. - _R. J. Mathar_, Aug 24 2008
%K A106253 nonn
%O A106253 1,1
%A A106253 _John W. Layman_, Apr 27 2005