A075202 Number of polyominoes with n cells that tile the plane by 180-degree rotation (Conway criterion).

1, 1, 2, 5, 12, 35, 101, 320, 960, 2701, 6164, 19770, 34918, 94023, 232714, 462463, 770010, 2462890, 3247171, 9756012, 18463420, 32963374, 51599559, 177923609, 236127160

Offset: 1

Author

Joseph Myers, Sep 08 2002

Keywords

• hard
• nonn

References

• Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.

Links

• Joseph Myers, Polyomino tiling

Crossrefs

Cf. A054359, A075198, A075199, A075200, A075201, A075203, A075204, A075205, A075206, A075211, A075220.

Extensions

More terms from Joseph Myers, Nov 04 2003

a(24) and a(25) from Joseph Myers, Nov 17 2010