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 A199692 #9 Oct 30 2018 10:31:02 %S A199692 5,41,73,149,157,277,313,613,617,709,929,1117,1201,1741,1753,1873, %T A199692 2381,2897,2969,3469,3613,3637,3697,4513,4597,5101,5953,6173,6857, %U A199692 6869,7577,8089,8581,9661,10369,10513,11717,12097,12653,12973,13001,13649,14461,15313 %N A199692 Subsequence of Pythagorean primes (A002144): each square is used only once. %H A199692 Zak Seidov, <a href="/A199692/b199692.txt">Table of n, a(n) for n = 1..2000</a> %e A199692 First Pythagorean prime A002144(1)=5=1+4, "uses" squares 1^2 and 2^2. %e A199692 Next Pythagorean prime which does not "use" 1^2 and 2^2 is A002144(6)=41=4^2+5^2, hence a(2)=41. %e A199692 Next Pythagorean prime which does not "use" 1^2, 2^2, 4^2 and 5^2 is A002144(9)=73=3^2+8^2, hence a(3)=73. %e A199692 Next Pythagorean prime which does not "use" 1^2, 2^2, 3^2, 4^2, 5^2 and 8^2 is A002144(16)=149=7^2+10^2, hence a(4)=149. %Y A199692 Cf. A002144. %K A199692 nonn %O A199692 1,1 %A A199692 _Zak Seidov_, Nov 09 2011