A121195 Consider the tiling of the plane with squares of two different sizes as in Fig. 2.4.2(g) of Grünbaum and Shephard, p. 74. a(n) is the number of connected figures that can be formed on this tiling, from n big squares and n small squares.

1, 12, 152, 2538, 45084, 851717

Offset: 1

Author

N. J. A. Sloane, Aug 17 2006

Keywords

• nonn
• more

Comments

The Zucca web site calls these figures "n-BiSquares".

References

• Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987.

Links

• Livio Zucca, PolyMultiForms
• Livio Zucca, The 12 2-BiSquares (from the Zucca web site).

Crossrefs

Cf. A121196, A121197, A121198.

Extensions

More terms from Don Reble, Aug 17 2007