%I #8 Apr 03 2018 10:14:20
%S 0,1,4,26,236,2763,39692
%N Half volumes of concertina hypercubes: a(n) = A300697(n)/2.
%Y Cf. A300697.
%K nonn,more
%O 0,3
%A _Tilman Piesk_, Mar 11 2018