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A106140 Semiprimes (mod 4). 0

%I #3 Oct 02 2013 15:47:28

%S 0,2,1,2,2,3,1,2,1,2,1,2,3,2,3,2,1,3,3,1,2,2,1,1,2,1,2,1,2,3,3,1,2,3,

%T 2,3,3,2,3,1,2,3,1,1,2,1,2,3,1,2,3,2,3,1,2,1,1,2,3,1,3,2,1,2,3,1,2,1,

%U 1,2,3,1,2,3,1,2,3,1,3,1,1,2,3,2,1,3,2,2,3,1,3,3,2,3,1,2,3,1,1,2,3,1,3,2,3

%N Semiprimes (mod 4).

%Y Cf. A001358.

%K nonn

%O 1,2

%A _Shyam Sunder Gupta_, May 07 2005

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Last modified July 25 02:23 EDT 2024. Contains 374585 sequences. (Running on oeis4.)