A025571 - OEIS

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A025571

a(n) = T(3n,n), where T is the array defined in A025564.

%I #6 Sep 07 2019 22:03:44

%S 1,3,19,140,1090,8749,71604,593997,4976785,42016975,356879250,

%T 3046096983,26105109424,224485080580,1936029865870,16738879226139,

%U 145041018993018,1259189426140919,10950454909118725,95374995078513150,831822673255797630,7263789225782699928

%N a(n) = T(3n,n), where T is the array defined in A025564.

%K nonn

%O 1,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Sep 07 2019