A049540 - OEIS

%I #9 Aug 24 2023 12:05:10

%S 1,1,1,3,5,17,55,267,1467,10371

%N Number of n-ominoes for a high-dimensional orthoplex.

%C An orthoplex polyomino does not extend more than two units along any axis.

%e There are a(5)=5 orthoplex pentominoes: the two 3-D pentominoes that fit in a 2 X 2 X 2 box and the three 4-D pentominoes.

%Y A005519 counts a superset.

%K hard,more,nice,nonn

%O 1,4

%A _Robert A. Russell_