Search: id:A106550
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%I A106550
%S A106550 26,29,42,35,41,50,58,233,80,239,344,251,92,257,352,269,126,368,566,376,
%T A106550 2,87,293,578,392,311,788,323,602,329,416,804,424,341,614,359,448,638,
%U A106550 377,836,1232,383,464,472,852,401,488,413,1256,674,419,686,437,512,884
%N A106550 a(n) = n-th semiprime + (concatenation of its two factors, smallest factor 
               first).
%F A106550 a(n) = A001358(n) + A106554(n). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               May 19 2005
%e A106550 First semiprime is 4; 4 is 2*2; 26=4+22.
%e A106550 Second semiprime is 6; 6 is 2*3; 29=6+23.
%e A106550 Third semiprime is 9; 9 is 3*3; 41=9+33.
%e A106550 Fourth semiprime is 10; 10 is 2*5; 35=10+25.
%Y A106550 Cf. A084126, A084127, A001358.
%Y A106550 Sequence in context: A081644 A055109 A106552 this_sequence A069962 A045163 
               A046292
%Y A106550 Adjacent sequences: A106547 A106548 A106549 this_sequence A106551 A106552 
               A106553
%K A106550 base,easy,nonn
%O A106550 1,1
%A A106550 Eric Angelini (eric.angelini(AT)kntv.be), May 09 2005
%E A106550 More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               May 19 2005

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