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%I #6 Sep 24 2019 21:21:09
%S 1,2,14,106,834,6732,55289,459742,3858524,32618022,277326906,
%T 2369003910,20315879480,174798617778,1508225204024,13045333585950,
%U 113076177711662,981982906771978,8542048596893910,74416362792323370,649168980344148876,5669882132589477798
%N a(n) = T(3n,n), where T is the array in A026268.
%K nonn
%O 0,2
%A _Clark Kimberling_
%E a(5) corrected and more terms from _Sean A. Irvine_, Sep 24 2019