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 A114390 #10 Jun 30 2022 08:39:23 %S A114390 1,4,25,16,41,100,81,64,241,164,137,400,505,324,289,256,865,964,953, %T A114390 656,713,548,1585,1600,1681,2020,1897,1296,1497,1156,1089,1024,3265, %U A114390 3460,3417,3856,4073,3812,3601,2624,2993,2852,2377,2192,2105,6340 %N A114390 a(n) = A065621(n^2). %F A114390 a(n) = A065621(A000290(n)). %o A114390 (Python) %o A114390 def A114390(n): return (m:=n**2)^ (m&~-m)<<1 # _Chai Wah Wu_, Jun 29 2022 %Y A114390 Cf. A000290, A065621. %Y A114390 A114391 gives the positions where a(n) is square, A114392 gives the corresponding values (squares) and A114393 gives their square roots. %K A114390 nonn %O A114390 1,2 %A A114390 _Antti Karttunen_, Feb 07 2006