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%I #15 Jan 08 2023 11:32:13
%S 0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N Characteristic function of two.
%C The Euler transformation of this sequence is A059841.
%C This sequence is the first differences of A157928.
%o (Python)
%o def A185012(n): return int(n==2) # _Chai Wah Wu_, Feb 04 2022
%Y Cf. A171386.
%Y Characteristic function of g: A000007 (g=0), A063524 (g=1), this sequence (g=2), A185013 (g=3), A185014 (g=4), A185015 (g=5), A185016 (g=6), A185017 (g=7).
%K nonn,easy
%O 0,1
%A _Jason Kimberley_, Oct 11 2011
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