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

1,2

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

Table of n, a(n) for n=1..18.

Eric Weisstein's World of Mathematics, Polyomino

Wikipedia, Polyomino

Crossrefs

Bisection of A000988.

Cf. A210989, A210996.

Sequence in context: A024090 A241770 A243695 * A222651 A287689 A289874

Adjacent sequences: A210985 A210986 A210987 * A210989 A210990 A210991

Keyword

nonn

Author

Omar E. Pol, Sep 16 2012

Status

approved