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 A087409 #26 Sep 05 2023 14:58:07
%S A087409 61,21,82,43,3,64,24,85,46,6,67,27,88,49,9,61,2,10,81,14,12,1,26,13,
%T A087409 21,38,14,41,50,15,61,62,16,81,74,18,1,86,19,21,98,20,42,10,21,62,22,
%U A087409 22,82,34,24,2,46,25,22,58,26,42,70,27,62,82,28,82,94,30,3,6,31,23,18,32,43
%N A087409 Multiples of 6 with digits grouped in pairs and leading zeros omitted.
%H A087409 Alois P. Heinz, <a href="/A087409/b087409.txt">Table of n, a(n) for n = 1..10000</a>
%H A087409 Brady Haran and N. J. A. Sloane, <a href="https://www.youtube.com/watch?v=OeGSQggDkxI">What Number Comes Next?</a> (2018), Numberphile video
%t A087409 FromDigits /@ Partition[ Flatten[ IntegerDigits[ Table[ 6n, {n, 1, 60}]]], 2] (* _Robert G. Wilson v_ *)
%Y A087409 Cf. A008588, A059805, A087406, A060936, A087407, A087408, A087075, A087410, A087411.
%K A087409 nonn,easy,base,look
%O A087409 1,1
%A A087409 _N. J. A. Sloane_, Oct 19 2003
%E A087409 More terms from _Ray Chandler_, Oct 20 2003