Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #9 Mar 23 2014 10:38:21
%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