Search: id:A115651
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%I A115651
%S A115651 1,4,8,9,16,25,27,49,64,72,108,121,125,128,169,392,400,432,441,500,512,
%T A115651 961,968,972,1125,1331,1352,1444,3844,3888,3969,4225,4232,4356,4900,
%U A115651 4913,5184,5292,5324,10404,10800,10952,11449,11881,14283,14400
%N A115651 Powerful(1) numbers (A001694) which are the sum of distinct double factorials 
               (A006882).
%C A115651 Double factorials 0!! and 1!! are not considered distinct. Note that 
               double factorial (n!!) is different from (n!)!.
%H A115651 <a href="Sindx_Pow.html#powerful">Index entries for sequences related 
               to powerful numbers</a>
%e A115651 392 = 2^3*7^2 = 8!! + 4!!.
%Y A115651 Cf. A001694, A006882, A115652, A115653, A115654.
%Y A115651 Sequence in context: A025475 A125643 A002760 this_sequence A062559 A010417 
               A155568
%Y A115651 Adjacent sequences: A115648 A115649 A115650 this_sequence A115652 A115653 
               A115654
%K A115651 nonn
%O A115651 1,2
%A A115651 Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 28 2006

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