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A229736 G.f.: x^5*(2-5*x+3*x^2-x^3)/((1-x)^2*(1-2*x)^2*(1-3*x+x^2)). 0
0, 0, 0, 0, 0, 2, 13, 56, 201, 652, 1987, 5812, 16527, 46062, 126511, 343698, 926073, 2479562, 6606805, 17537444, 46415109, 122559832, 323033839, 850211680, 2235203355, 5871127002, 15410683483, 40428032286, 106011825381, 277892656502, 728253346657, 1908075342992, 4998455710257, 13092392061412, 34289189456731 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

REFERENCES

D. Battaglino, J. M. Fedou, S. Rinaldi and S. Socci, The number of k-parallelogram polyominoes, FPSAC 2013 Paris, France DMTCS Proc. AS, 2013, 1143-1154; http://www.liafa.univ-paris-diderot.fr/fpsac13/pdfAbstracts/dmAS0203.pdf

LINKS

Table of n, a(n) for n=0..34.

CROSSREFS

Sequence in context: A144235 A180041 A042061 * A187560 A290721 A205532

Adjacent sequences:  A229733 A229734 A229735 * A229737 A229738 A229739

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 04 2013

STATUS

approved

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Last modified September 18 23:30 EDT 2020. Contains 337175 sequences. (Running on oeis4.)