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 A037331 #11 Jun 30 2021 12:10:10
%S A037331 1,2,3,4,5,6,91,92,93,94,95,133,134,135,176,177,178,179,180,181,217,
%T A037331 218,219,220,221,222,223,259,260,261,262,263,304,305,306,307,385,386,
%U A037331 387,388,389,390,391,432,433,472,473,474,475,553
%N A037331 Numbers whose base-7 and base-8 expansions have the same digit sum.
%F A037331 {n: A053828(n) = A053829(n).} - _R. J. Mathar_, Jun 30 2021
%t A037331 Select[Range[600],Total[IntegerDigits[#,7]]==Total[IntegerDigits[#,8]]&] (* _Harvey P. Dale_, Sep 05 2015 *)
%K A037331 nonn,base
%O A037331 1,2
%A A037331 _Clark Kimberling_