A210988 Number of one-sided polyominoes with 2n cells.

1, 7, 60, 704, 9189, 126759, 1802312, 26152418, 385221143, 5741256764, 86383382827, 1309998125640, 19998172734786, 307022182222506, 4736694001644862, 73390033697855860, 1141388483146794007, 17810678207278478530

Offset: 1

Author

Omar E. Pol, Sep 16 2012

Keywords

• nonn

Comments

Sequence related with polydominoes and other similar sequences. It appears that we can write A216492(n) < A216583(n) < A056785(n) < A056786(n) < A210996(n) < a(n) < A210986(n), if n >= 3. - Omar E. Pol, Sep 16 2012

Links

• Eric Weisstein's World of Mathematics, Polyomino
• Wikipedia, Polyomino

Crossrefs

Bisection of A000988.

Cf. A210989, A210996.