A368030 - OEIS

%I #18 Dec 10 2023 11:43:04

%S 1,3,12,47,168,532,1344,2707,5064,11236,24768,53614,112464,222564,

%T 411008,723884,1263696,2236452,3953448,6855498,11544816,18880992,

%U 30104592,46815126,70776080,103864092,148069152,205499496,278917752,373204912,496855592,663056406,890682648,1205069272

%N Number of fixed midpoint-free polycubes of size n.

%C Midpoint-free means that no three cubes are in positions (x,y,z), (x+dx,y+dx,z+dz), and (x+2*dx,y+2*dx,z+2*dz).

%Y Cf. A368029.

%K nonn

%O 1,2

%A _Joerg Arndt_, Dec 08 2023