login
A368030
Number of fixed midpoint-free polycubes of size n.
1
1, 3, 12, 47, 168, 532, 1344, 2707, 5064, 11236, 24768, 53614, 112464, 222564, 411008, 723884, 1263696, 2236452, 3953448, 6855498, 11544816, 18880992, 30104592, 46815126, 70776080, 103864092, 148069152, 205499496, 278917752, 373204912, 496855592, 663056406, 890682648, 1205069272
OFFSET
1,2
COMMENTS
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).
CROSSREFS
Cf. A368029.
Sequence in context: A216946 A303191 A176310 * A077829 A088132 A122450
KEYWORD
nonn
AUTHOR
Joerg Arndt, Dec 08 2023
STATUS
approved