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 A107037 #12 Feb 25 2024 01:44:21
%S A107037 1,2,3,4,5,6,7,8,10,11,12,13,14,15,16,17,19,21,22,23,24,25,26,28,29,
%T A107037 30,31,32,33,34,35,37,38,39,41,43,44,46,47,48,49,50,51,52,53,56,57,58,
%U A107037 59,61,62,64,65,66,67,68,69,70,71,73,74,75,76,77,78,79,82,83,85,86,87,88
%N A107037 Indices of squarefree Jacobsthal numbers.
%H A107037 Amiram Eldar, <a href="/A107037/b107037.txt">Table of n, a(n) for n = 1..899</a>
%t A107037 Rest[Flatten[Position[CoefficientList[Series[1/(1-x-2x^2),{x,0,100}],x],_?SquareFreeQ]]] (* _Harvey P. Dale_, May 27 2016 *)
%Y A107037 Cf. A001045, A005117, A037918.
%K A107037 nonn
%O A107037 1,2
%A A107037 _Paul Barry_, May 09 2005
%E A107037 Offset corrected by _Amiram Eldar_, Feb 25 2024