%I #9 Apr 10 2018 08:26:38
%S 1,1,4,10,39,131,521,1989,8149,33205,139870,592120,2552155
%N Number of 3D walks of type abd.
%C See Dershowitz (2017) for precise definition.
%H Nachum Dershowitz, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL20/Dershowitz/dersh3.html">Touchard’s Drunkard</a>, Journal of Integer Sequences, Vol. 20 (2017), #17.1.5.
%Y Cf. A000108, A000984, A002212, A002896, A005572, A026375, A064037, A081671, A138547, A145847, A145867, A150500, A202814.
%K nonn,walk,more
%O 0,3
%A _N. J. A. Sloane_, Apr 09 2018