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 A031488 #7 Jul 04 2021 15:55:03 %S A031488 8,16,24,32,40,48,65,66,67,68,69,70,72,80,88,96,104,112,129,130,131, %T A031488 132,133,134,136,144,152,160,168,176,193,194,195,196,197,198,200,208, %U A031488 216,224,232,240,257,258,259,260,261,262,264,272 %N A031488 Numbers whose base-8 representation has one more 0 than 7's. %Y A031488 Cf. A007094. %K A031488 nonn,base %O A031488 1,1 %A A031488 _Clark Kimberling_