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 A037667 #10 Nov 30 2024 19:43:44 %S A037667 3,14,56,227,910,3640,14563,58254,233016,932067,3728270,14913080, %T A037667 59652323,238609294,954437176,3817748707,15270994830,61083979320, %U A037667 244335917283,977343669134,3909374676536,15637498706147,62549994824590,250199979298360,1000799917193443 %N A037667 Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0. %H A037667 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,0,1,-4). %F A037667 G.f.: x*(3+2*x) / ( (x-1)*(4*x-1)*(1+x+x^2) ). - _R. J. Mathar_, Apr 30 2015 %e A037667 Terms in base 4: 3, 32, 320, 3203, 32032, 320320, 3203203, 32032032, 320320320, ... . %K A037667 nonn,base,easy %O A037667 1,1 %A A037667 _Clark Kimberling_