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A268666 Number of polycubes with n cells, allowing edge connections as well as face connections, identifying mirror images. 2
1, 2, 8, 64, 646, 9364, 151028 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

a(2) = 2 because there are two ways to join two cells in the cubic grid at faces or edges.

CROSSREFS

Cf. A270862 (distinguishing mirror images), A038119, A000162, A030222 (2-dimensional polyplets).

Sequence in context: A191570 A052707 A059862 * A193549 A005612 A136282

Adjacent sequences:  A268663 A268664 A268665 * A268667 A268668 A268669

KEYWORD

nonn,more,nice,hard

AUTHOR

George Sicherman, Feb 10 2016

STATUS

approved

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Last modified August 17 17:08 EDT 2019. Contains 326059 sequences. (Running on oeis4.)