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%I #17 Mar 25 2021 12:39:38
%S 2,10,50,250,410,1250,2050,5050,6250,10250,16810,25250,31250,51250,
%T 84050,126250,156250,207050,256250,336610,405050,420250,510050,631250,
%U 689210,781250,1035250,1281250,1683050,1750250,2025250,2101250,2550250,3156250,3446050
%N Positive integers n such that n | (2^n + n/2 + 1).
%F a(n) = 2 * A015950(n). - _Max Alekseyev_, Aug 04 2011
%o (Python)
%o A015945_list = [n for n in range(2,10**6,2) if pow(2,n,n) == n//2-1] # _Chai Wah Wu_, Mar 25 2021
%K nonn
%O 1,1
%A _Robert G. Wilson v_
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