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 A022479 #11 May 16 2019 08:44:51 %S A022479 0,0,0,0,1,1,2,2,1,2,3,5,6,8,13,16,21,30,38,50,63,86,115,145,193,258, %T A022479 355,466,609,820,1093,1449,1898,2523,3380,4450,5878,7834,10430,13798, %U A022479 18246,24299,32307,42806,56685,75342,100107,132631 %N A022479 Number of 3's in n-th term of A006711. %Y A022479 Cf. A006711, A022477, A022478. %K A022479 nonn,base %O A022479 1,7 %A A022479 _Clark Kimberling_ %E A022479 More terms from _Sean A. Irvine_, May 15 2019