Search: id:A115654
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%I A115654
%S A115654 4,6,9,10,14,15,21,25,26,49,51,57,58,62,65,69,74,77,106,111,115,118,119,
%T A115654 121,122,123,129,133,134,155,158,159,161,166,169,177,178,386,393,394,
%U A115654 395,398,403,407,411,413,437,445,446,447,451,453,458,489,493,497
%N A115654 Semiprimes (A001358) which are the sum of distinct double factorials 
               (A006882).
%C A115654 Double factorials 0!! and 1!! are not considered distinct. Note that 
               double factorial (n!!) is different from (n!)!.
%e A115654 384 = 2*19 = 8!!+2!!.
%Y A115654 Cf. A006882, A001358, A115651, A115652, A115653.
%Y A115654 Sequence in context: A157931 A046368 A113433 this_sequence A036326 A078972 
               A115652
%Y A115654 Adjacent sequences: A115651 A115652 A115653 this_sequence A115655 A115656 
               A115657
%K A115654 nonn
%O A115654 1,1
%A A115654 Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 28 2006

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