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A049540 Number of n-ominoes for a high-dimensional orthoplex. 0
1, 1, 1, 3, 5, 17, 55, 267, 1467, 10371 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

An orthoplex polyominoes 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 is a superset.

Sequence in context: A006483 A177960 A271659 * A097144 A219108 A176964

Adjacent sequences:  A049537 A049538 A049539 * A049541 A049542 A049543

KEYWORD

hard,nice,nonn

AUTHOR

Robert A. Russell

STATUS

approved

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Last modified October 18 16:28 EDT 2018. Contains 316323 sequences. (Running on oeis4.)