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A026735 Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026725. 0

%I

%S 1,1,2,3,6,9,15,28,43,71,130,201,331,597,928,1525,2720,4245,6965,

%T 12315,19280,31595,55472,87067,142539,248802,391341,640143,1111864,

%U 1752007,2863871,4953162,7817033,12770195,22004810,34775005,56779815

%N Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026725.

%F Conjecture: G.f.:-1/2*(2*x^6-5*x^4+8*x^3+x-2+x*(x-1)*(x^2+x+1)*(1-4*x^3)^(1/2))/(x^6+4*x^3-1)/(x^2+x-1) [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 11 2009]

%K nonn

%O 0,3

%A _Clark Kimberling_

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Last modified May 23 17:52 EDT 2013. Contains 225611 sequences.