A056755 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.

2, 10, 68, 609, 5652

Offset: 1

Author

James Sellers, Aug 28 2000

Keywords

• nonn
• obsc

Comments

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.

Row 11 of polyforms table, puzzle 1 (See link). - Omar E. Pol, Feb 22 2011.

Links

• 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

Crossrefs

Cf. A121194.

Extensions

Edited by N. J. A. Sloane, Jun 21 2001