A049540 Number of n-ominoes for a high-dimensional orthoplex.

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

Offset

1,4

Comments

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

Links

Table of n, a(n) for n=1..10.

Example

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.

Crossrefs

A005519 counts a superset.

Sequence in context: A177960 A271659 A357442 * A097144 A219108 A176964

Adjacent sequences: A049537 A049538 A049539 * A049541 A049542 A049543

Keyword

hard,more,nice,nonn

Author

Robert A. Russell

Status

approved