Search: id:A087112
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%I A087112
%S A087112 4,6,9,10,15,25,14,21,35,49,22,33,55,77,121,26,39,65,91,143,169,34,51,
%T A087112 85,119,187,221,289,38,57,95,133,209,247,323,361,46,69,115,161,253,299,
%U A087112 391,437,529,58,87,145,203,319,377,493,551,667,841,62,93,155,217,341
%N A087112 Triangle in which the n-th row contains n distinct semiprimes not listed 
               previously with all prime factors from among the first n primes.
%C A087112 Terms through row n, sorted, will provide terms for A077553 through row 
               n*(n+1)/2.
%F A087112 The n-th row consists of n terms, prime(n)*prime(i), i=1, n.
%e A087112 4;
%e A087112 6,9;
%e A087112 10,15,25;
%e A087112 14,21,35,49;
%e A087112 22,33,55,77,121;
%e A087112 26,39,65,91,143,169;
%Y A087112 Sequence in context: A122492 A133234 A111206 this_sequence A077554 A118778 
               A108635
%Y A087112 Adjacent sequences: A087109 A087110 A087111 this_sequence A087113 A087114 
               A087115
%K A087112 nonn,tabl
%O A087112 1,1
%A A087112 Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 21 2003

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