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Search: id:A056755
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| A056755 |
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Number of n-celled polyominoes, where the cells are 1 X 2 rectangles with some of the edges of length 2 replaced by curved arcs that either sag inwards or bulge outwards. |
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+0
2
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OFFSET
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1,1
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COMMENT
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The rules that govern which edges are changed are not completely clear, so two examples drawn by M. Vicher have been included.
Probably an erroneous version of A121194.
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LINKS
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M. Vicher, Polyforms
M. Vicher, The 10 2-celled polyominoes
M. Vicher, The 10 2-celled polyominoes
M. Vicher, The 68 3-celled polyominoes
M. Vicher, The 68 3-celled polyominoes
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CROSSREFS
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Cf. A121194.
Sequence in context: A136658 A165968 A104098 this_sequence A123617 A139715 A051575
Adjacent sequences: A056752 A056753 A056754 this_sequence A056756 A056757 A056758
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KEYWORD
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nonn,obsc
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AUTHOR
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James A. Sellers (sellersj(AT)math.psu.edu), Aug 28 2000
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Jun 21 2001
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