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 A005699 #14 Jul 08 2025 00:29:18 %S A005699 0,3,5,1,2,12,1,1,47,1,1,51054,1,1,53,1,1,13,2,1,6,3,1,3,5,1,2,11,1,1, %T A005699 42,1,1,5673,1,1,61,1,1,14,2,1,6,3,1,3,5,1,2,11,1,1,37,1,1,2042,1,1, %U A005699 70,1,1,15,2,1,6,3,1,3,5,1,2,10,1,1,33,1,1,1042,1,1,82,1,1,16,2,1,6,3,1,3,4,1,2,9,1,1,30,1,1,630,1,1,96,1,1,17 %N A005699 a(n) = ceiling(tan(n)^2). %C A005699 For n > 0, a(n) = floor(sec(n)^2). - _N. J. A. Sloane_, Mar 17 2025 %o A005699 (PARI) a(n) = ceil(tan(n)^2); \\ _Seiichi Manyama_, Feb 28 2024 %Y A005699 Cf. A005657, A195910. %K A005699 nonn,easy %O A005699 0,2 %A A005699 _N. J. A. Sloane_ %E A005699 More terms from _Seiichi Manyama_, Feb 28 2024