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Search: id:A114715
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| A114715 |
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Triangle read by rows: number of linear extensions of a 2 X n X m lattice. |
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+0
3
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| 1, 2, 2, 5, 48, 5, 14, 2452, 2452, 14, 42, 183958, 4877756, 183958, 42, 132, 17454844, 20071150430, 20071150430, 17454844, 132, 429, 1941406508, 129586764260850, 6708527580006468, 129586764260850, 1941406508, 429
(list; table; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Stanley, R., Enumerative Combinatorics, Vol. 2, Proposition 7.10.3 and Vol. 1, Sec 3.5 Chains in Distributive Lattices.
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CROSSREFS
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Cf. A114717.
Sequence in context: A014566 A076658 A020549 this_sequence A036739 A091085 A011144
Adjacent sequences: A114712 A114713 A114714 this_sequence A114716 A114717 A114718
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KEYWORD
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nonn,tabl,hard
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AUTHOR
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Mitch Harris (Harris.Mitchell (AT) mgh.harvard.edu), Dec 27, 2005
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