Search: id:A067989
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%I A067989
%S A067989 1,9,34,95,240,553,1212,2547,5195,10340,20184,38766,73451,137565,
%T A067989 255080,468877,855288,1549583,2790510,4997895,8907481,15804634,
%U A067989 27928464,49169100,86268325,150882993,263124862
%N A067989 Row sums of triangle A067979; also of triangle A067990.
%F A067989 a(n)= (n+2)*((3*n+1)*F(n-1)/2+(2*n+1)*F(n)), with F(n) := A000045(n) 
               (Fibonacci).
%F A067989 G.f.: (1+4*x-x^2)*(1+2*x)/(1-x-x^2)^3.
%Y A067989 Sequence in context: A014816 A147691 A000441 this_sequence A002881 A005344 
               A050478
%Y A067989 Adjacent sequences: A067986 A067987 A067988 this_sequence A067990 A067991 
               A067992
%K A067989 nonn,easy
%O A067989 0,2
%A A067989 Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Feb 15 
               2002

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