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A210988 Number of one-sided polyominoes with 2n cells. 5
1, 7, 60, 704, 9189, 126759, 1802312, 26152418, 385221143, 5741256764, 86383382827, 1309998125640, 19998172734786, 307022182222506, 4736694001644862, 73390033697855860, 1141388483146794007, 17810678207278478530 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 16 20:35 EDT 2024. Contains 372555 sequences. (Running on oeis4.)