A025191 - OEIS

%I #10 Aug 06 2024 00:03:42

%S 1,1,4,11,33,97,288,855,2544,7577,22590,67399,201215,601017,1795966,

%T 5368659,16053417,48015873,143649102,429842511,1286452725,3850770081,

%U 11528245602,34517105907,103360732956,309543786441,927106804368,2776994293355

%N a(n) = Sum_{k=0..n} T(n,k), where T is the array defined in A025177.

%C Conjectures: a(n) = A027914(n)-A027914(n-1) = (A081673(n)-A081673(n-1))/2.

%K nonn

%O 0,3

%A _Clark Kimberling_

%E a(1) corrected by _Jason Yuen_, Aug 05 2024