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 A005671 #10 Jul 08 2025 00:27:51 %S A005671 0,2,5,0,1,11,0,1,46,0,0,51054,0,0,52,1,0,12,1,0,5,2,0,3,5,0,1,11,0,1, %T A005671 41,0,0,5672,0,0,60,1,0,13,1,0,5,2,0,3,4,0,1,10,0,1,37,0,0,2042,0,0, %U A005671 69,1,0,14,1,0,6,2,0,3,4,0,1 %N A005671 Nearest integer to tan(n)^2. %H A005671 R. K. Guy, <a href="/A005667/a005667.pdf">Letter to N. J. A. Sloane, 1987</a> %t A005671 Round[Tan[Range[0,70]]^2] (* _Harvey P. Dale_, Aug 01 2016 *) %K A005671 nonn %O A005671 0,2 %A A005671 _N. J. A. Sloane_