id:A057707 - OEIS Search Results

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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

1, 8, 80, 1296, 22601 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The last part of the definition restricts the possible attachments of the squares to the octagons.`
	LINKS	`Livio Zucca, PolyMultiForms` `For source see Brendan Owen's web site. [Where is Brendan Owen's web site?]`
	CROSSREFS	`Sequence in context: A060375 A097815 A002718 this_sequence A145606 A002072 A067449` `Adjacent sequences: A057704 A057705 A057706 this_sequence 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`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research