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 A189665 #9 Oct 16 2019 12:26:59 %S A189665 1,3,4,5,7,9,10,12,13,15,16,17,19,21,22,23,25,27,28,30,31,32,34,36,37, %T A189665 39,40,41,43,45,46,48,49,51,52,53,55,57,58,59,61,63,64,66,67,69,70,71, %U A189665 73,75,76,77,79,81,82,84,85,86,88,90,91,93,94,96,97,98,100,102,103,104,106,108,109,111,112,113,115,117,118,120,121,123,124,125,127,129,130,131,133,135 %N A189665 Positions of 0's in A189664; complement of A189666. %C A189665 See A189664. %F A189665 2*a(n) = A284794(n) for n>=1. (Conjectured by Clark Kimberling, see A189664). - _Michel Dekking_, Oct 15 2019 %t A189665 (See A189664.) %Y A189665 Cf. A189664, A189666, A189667. %K A189665 nonn %O A189665 1,2 %A A189665 _Clark Kimberling_, Apr 25 2011