A026129 - OEIS

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A026129

a(n) = T(3n,n), where T is the array in A026120.

%I #7 Sep 17 2019 14:55:08

%S 1,2,16,120,945,7630,62678,521264,4375359,36990200,314520602,

%T 2686858784,23042640803,198266292798,1710759087810,14797477375776,

%U 128266110749332,1113914431675710,9689827680172220,84416582373480000,736413484617492927,6431941663589330086,56239398241150978776

%N a(n) = T(3n,n), where T is the array in A026120.

%K nonn

%O 0,2

%A _Clark Kimberling_

%E Corrected and extended by _Sean A. Irvine_, Sep 17 2019