A121196 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 tiles, each composed of a big square and an adjacent little square.

1, 11, 114, 1519, 20769

Offset: 1

Author

N. J. A. Sloane, Aug 17 2006

Keywords

• nonn

Comments

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

References

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

Links

• Livio Zucca, PolyMultiForms

Crossrefs

Cf. A121195, A121197, A121198.

Extensions

Better definition from Don Reble, Aug 17 2007