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A007743 Number of n-celled mirror-symmetric solid polyominoes (or polycubes). 3
1, 1, 2, 6, 17, 58, 191, 700, 2515, 9623, 36552, 143761, 564443, 2259905, 9057278, 36705846 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A000162 but with both copies of each mirror-image deleted.

LINKS

Table of n, a(n) for n=1..16.

G. Thimm, Emails to N. J. A. Sloane, Sep. 1994

CROSSREFS

A038119 = (A007743+A000162)/2, A007743 = 2*A038119 - A000162, A000162 = 2*A038119 - A007743.

Sequence in context: A032132 A339223 A148454 * A000687 A085827 A150035

Adjacent sequences:  A007740 A007741 A007742 * A007744 A007745 A007746

KEYWORD

nonn,nice

AUTHOR

Arlin Anderson (starship1(AT)gmail.com)

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007

Changed "symmetric" to "mirror-symmetric" in the title by George Sicherman, Feb 21 2018

STATUS

approved

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Last modified May 9 13:42 EDT 2021. Contains 343742 sequences. (Running on oeis4.)