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A027009 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+2)/2 ], T given by A026998. 0

%I #5 Mar 30 2012 18:56:13

%S 1,1,9,14,46,81,209,389,901,1726,3774,7349,15541,30561,63329,125294,

%T 256366,509161,1033449,2057549,4154701,8284926,16673534,33282989,

%U 66837421,133507081,267724809,535010414,1071881326,2142612801

%N a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+2)/2 ], T given by A026998.

%F G.f.: x(-2x^4-x^3+4x^2-x+1)/[(1-2x)(1+x-x^2)(1-x-x^2)].

%K nonn

%O 1,3

%A _Clark Kimberling_

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)