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%I #12 Dec 24 2019 17:30:32
%S 1,1,0,1,0,1,1,0,0,0,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,
%T 0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,
%U 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0
%N a(n) = 1 if 2*n + 1 is Sprime (A193258), else a(n) = 0.
%H Ian R Harris, <a href="/A254634/a254634.pdf">Sprimes: A Sparse Prime-Like Sequence of Natural Numbers Generated by the Goldbach Conjecture</a>, Technical report TR-375.
%e a(1) = 1 because 2*1+1 = 3 is Sprime;
%e a(2) = 0 because 2*2+1 = 5 is not Sprime;
%e a(3) = 1 because 2*3+1 = 7 is Sprime;
%e a(4) = 0 because 2*4+1 = 9 is not Sprime.
%Y Cf. A193258, A101264.
%K nonn
%O 0
%A _Ian R Harris_, Feb 03 2015
%E Terms a(58) and beyond from _Andrew Howroyd_, Dec 23 2019
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