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 A246410 #10 Aug 29 2014 19:13:08 %S A246410 2,4,6,8,10,12,14,16,18,20,22,23,25,27,29,31,33,35,37,39,41,43,46,48, %T A246410 50,52,54,56,58,60,62,64,66,67,69,71,73,75,77,79,81,83,85,87,90,92,94, %U A246410 96,98,100,102,104,106,108,110,111,113,115,117,119,121,123 %N A246410 Positive integers k satisfying csc(k) < csc(k+1). %C A246410 Every positive integer is in exactly one of the sequences A246410, A246411, and A246412. %H A246410 Clark Kimberling, <a href="/A246410/b246410.txt">Table of n, a(n) for n = 1..1000</a> %t A246410 z = 200; f[x_] := f[x] = Csc[x]; %t A246410 Select[Range[1, z], f[#] < f[# + 1] &] (*A246410*) %t A246410 Select[Range[1, z], f[#] > f[# + 1] < f[# + 2] &] (*A246411*) %t A246410 Select[Range[1, 10 z], f[#] > f[# + 1] > f[# + 2] < f[# + 3] &] (*A246412*) %Y A246410 Cf. A246411, A246412, A246413 (complement of a(n)). %K A246410 nonn,easy %O A246410 1,1 %A A246410 _Clark Kimberling_, Aug 25 2014