%I #7 May 24 2020 04:40:18
%S 1,20,204,616,2428,3968,11164
%N Column k=2 of A334691.
%Y Cf. A334691, A334693.
%K nonn,more
%O 1,2
%A _Scott R. Shannon_ and _N. J. A. Sloane_, May 18 2020
