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 A098354 #7 Nov 21 2021 16:49:19
%S A098354 4,8,8,16,16,16,32,32,32,32,64,64,64,64,64,128,128,128,128,128,128,
%T A098354 256,256,256,256,256,256,256,512,512,512,512,512,512,512,512,1024,
%U A098354 1024,1024,1024,1024,1024,1024,1024,1024,2048,2048,2048,2048,2048,2048,2048,2048
%N A098354 Multiplication table of the powers of 2 read by antidiagonals.
%H A098354 Harvey P. Dale, <a href="/A098354/b098354.txt">Table of n, a(n) for n = 1..1000</a>
%H A098354 <a href="/index/Di#divseq">Index to divisibility sequences</a>
%e A098354 4; 8,8; 16,16,16; 32,32,32,32; ...
%t A098354 Table[PadRight[{},n-1,2^n],{n,2,12}]//Flatten (* _Harvey P. Dale_, Nov 21 2021 *)
%o A098354 (PARI) for(n=2,9,for(i=1,n-1,print1(2^n", "))) \\ _Charles R Greathouse IV_, Apr 09 2012
%Y A098354 Cf. A003991, A098355.
%K A098354 nonn,tabl,easy
%O A098354 1,1
%A A098354 Douglas Stones (dssto1(AT)student.monash.edu.au), Sep 04 2004