Search: id:A080951
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%I A080951
%S A080951 1,5,30,140,560,2016,6720,21120,63360,183040,512512,1397760,3727360,
%T A080951 9748480,25067520,63504384,158760960,392232960,958791680,2321285120,
%U A080951 5571084288,13264486400,31352422400,73610035200,171756748800
%N A080951 Sequence associated with recurrence a(n)=2*a(n-1)+k(k+2)*a(n-2).
%C A080951 Fifth column of triangle A080928.
%F A080951 G.f.: (1-x)(1-4x+16x^2-24x^3+16x^4)/(1-2x)^5
%F A080951 ceil(binomial(n+4,4)*2^(n-1)). - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Nov 01 2006
%p A080951 [seq( ceil(binomial(n+4,4)*2^(n-1)),n=0..24)]; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Nov 01 2006
%Y A080951 Cf. A082140, A082141, A082138, A082139, A080929, A057711.
%Y A080951 Sequence in context: A000649 A027173 A054612 this_sequence A055298 A104891 
               A110155
%Y A080951 Adjacent sequences: A080948 A080949 A080950 this_sequence A080952 A080953 
               A080954
%K A080951 easy,nonn
%O A080951 0,2
%A A080951 Paul Barry (pbarry(AT)wit.ie), Feb 26 2003

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