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0, 0, 4, 16, 53, 172, 568, 1906, 6471, 22200, 76884, 268350, 942649, 3329606, 11817580, 42120338, 150682448, 540832272, 1946892840, 7027047846, 25424079337, 92185846606, 334925007126, 1219054432488, 4444545298877, 16229462702150, 59347661054362
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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REFERENCES
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Gadi Aleksandrowicz and Gill Barequet, Parallel Enumeration of Lattice Animals, in Frontiers in Algorithmics and Algorithmic Aspects in Information and Management, Lecture Notes in Computer Science, 2011, Volume 6681/2011, 90-99, DOI: 10.1007/978-3-642-21204-8_13. See the table of A_2^(PT)(n).
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LINKS
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Table of n, a(n) for n=1..27.
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CROSSREFS
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Sequence in context: A074409 A056589 A074407 * A293884 A121159 A239032
Adjacent sequences: A192071 A192072 A192073 * A192075 A192076 A192077
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane, Jun 22 2011
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STATUS
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approved
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