Search: id:A140325
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%I A140325
%S A140325 1,18,180,1320,7920,41184,192192,823680,3294720,12446720,44808192,
%T A140325 154791936,515973120,1666990080,5239111680,16066609152,48199827456,
%U A140325 141764198400,409541017600,1163958681600,3259084308480,9001280471040
%N A140325 Binomial(n+8,8)*2^n.
%C A140325 With a different offset, number of n-permutations (n>=8) of 3 objects: 
               u, v, z with repetition allowed, containing exactly eight (8) u's.
%C A140325 If n=8 then a(0)= 1
%C A140325 Example: a(1)=18 because we have
%C A140325 uuuuuuuuv, uuuuuuuvu, uuuuuuvuu, uuuuuvuuu, uuuuvuuuu, uuuvuuuuu, uuvuuuuuu, 
               uvuuuuuuu, vuuuuuuuu, uuuuuuuuz, uuuuuuuzu, uuuuuuzuu, uuuuuzuuu, 
               uuuuzuuuu, uuuzuuuuu, uuzuuuuuu, uzuuuuuuu and zuuuuuuu.
%p A140325 seq(binomial(n+8,8)*2^n,n=0..28);
%o A140325 (Other) SAGE: [lucas_number2(n, 2, 0)*binomial(n,8)/256 for n in xrange(8, 
               30)] [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 10 
               2009]
%Y A140325 Sequence in context: A071910 A121038 A004410 this_sequence A155669 A160954 
               A160955
%Y A140325 Adjacent sequences: A140322 A140323 A140324 this_sequence A140326 A140327 
               A140328
%K A140325 nonn
%O A140325 0,2
%A A140325 Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 23 2008

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