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A057707 Number of poly-octagon squares: a(n) = number of 'polyominoes' that can be formed by n octagons and n squares (of perimeter 8m and 4m respectively) not counting rotations or reflections such that the resulting objects will fit on the plane that is uniformly tiled by the same size octagons and squares. 0
1, 8, 80, 1296, 22601 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The last part of the definition restricts the possible attachments of the squares to the octagons.

LINKS

Table of n, a(n) for n=1..5.

Livio Zucca, PolyMultiForms

For source see Brendan Owen's web site. [Where is Brendan Owen's web site?]

CROSSREFS

Sequence in context: A097815 A002718 A222825 * A222671 A271443 A240325

Adjacent sequences:  A057704 A057705 A057706 * A057708 A057709 A057710

KEYWORD

nonn,nice,more

AUTHOR

Warren Power (wjpnply(AT)hotmail.com), Oct 24 2000

EXTENSIONS

Better description from Larry Reeves (larryr(AT)acm.org), Nov 30 2000

STATUS

approved

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Last modified January 27 17:58 EST 2020. Contains 331296 sequences. (Running on oeis4.)