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 A369703 #15 Feb 17 2024 11:28:05 %S A369703 2,4,7,8,16,25,31,32,56,64,92,103,127,128,256,409,424,428,473,484,496, %T A369703 511,512,904,1024,1639,1676,2047,2048,3041,3359,4064,4096,6476,6553, %U A369703 6887,6956,7681,8161,8191,8192,14456,16384,24065,24935,25508,26060,26215,28360 %N A369703 Numbers X such that X^2 + Y^2 = 2^(2*k) + 1 and X > Y > 0 and k is the binary digit length of X-1. %H A369703 A.H.M. Smeets, <a href="/A369703/b369703.txt">Table of n, a(n) for n = 1..815</a> %Y A369703 Cf. A368418 (base 10). %K A369703 nonn,base %O A369703 1,1 %A A369703 _A.H.M. Smeets_, Jan 29 2024