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 A347689 #6 Sep 27 2021 06:54:19 %S A347689 0,0,0,0,0,0,0,0,0,0,1,0,1,2,3,4,5,6,7,8,2,1,0,1,2,3,4,5,6,7,3,2,1,0, %T A347689 1,2,3,4,5,6,4,3,2,1,0,1,2,3,4,5,5,4,3,2,1,0,1,2,3,4,6,5,4,3,2,1,0,1, %U A347689 2,3,7,6,5,4,3,2,1,0,1,2,8,7,6,5,4,3,2,1,0,1,9,8,7,6,5,4,3,2,1,0,11,11,21,31,41,51,61,71,81,91,11,0,11,22,33,44,55,66,77,88 %N A347689 A347688(n)/9. %F A347689 a(n) = A297330(n) for n<=99. - _R. J. Mathar_, Sep 27 2021 %F A347689 a(n) = A037904(n) for n<=99. - _R. J. Mathar_, Sep 27 2021 %p A347689 A347689 := proc(n) %p A347689 A347688(n)/9 ; %p A347689 end proc: # _R. J. Mathar_, Sep 27 2021 %Y A347689 Cf. A347688. %K A347689 nonn %O A347689 0,14 %A A347689 _N. J. A. Sloane_, Sep 23 2021 %E A347689 More than the usual number of terms are shown in order to distinguish this from similar sequences.