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A106146 Semiprimes (mod 10). 4

%I

%S 4,6,9,0,4,5,1,2,5,6,3,4,5,8,9,6,9,1,5,7,8,2,5,9,4,7,2,5,6,7,1,3,4,5,

%T 6,1,5,8,9,1,2,3,9,3,4,1,2,3,5,6,5,8,9,1,6,9,7,8,3,5,7,4,1,2,3,5,6,9,

%U 3,4,5,7,8,9,1,6,5,7,7,9,3,4,9,2,5,7,4,8,7,9,1,5,8,9,1,2,3,5,9,4,9,1,3,6,7

%N Semiprimes (mod 10).

%H Reinhard Zumkeller, <a href="/A106146/b106146.txt">Table of n, a(n) for n = 1..10000</a>

%t Mod[#,10]&/@Select[Range[500],PrimeOmega[#]==2&] (* _Harvey P. Dale_, Apr 04 2013 *)

%o (Haskell)

%o a106146 = flip mod 10 . a001358 -- _Reinhard Zumkeller_, Mar 23 2014

%Y Cf. A001358.

%Y Cf. A239634 (initial digits).

%K nonn

%O 1,1

%A _Shyam Sunder Gupta_, May 07 2005

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Last modified October 14 12:45 EDT 2019. Contains 328006 sequences. (Running on oeis4.)