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Search: id:A056934
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| A056934 |
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Antichains (or order ideals) in the poset 2*2*7*n or size of the distributive lattice J(2*2*7*n) |
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+0
9
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| 1, 540, 75966, 4701698, 164489084, 3764727340, 61951251333, 782318812002, 7946895019096, 67270102239520, 487605585591870, 3092040981805272, 17451258588313354, 88902214572208640, 413569247116248032
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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Berman and Koehler, Cardinalities of finite distributive lattices, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), p. 103-124
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LINKS
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Index entries for sequences related to posets
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MATHEMATICA
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MatrixPower[ ZetaP[ #, n + 1 ][ [ 1, Card[ # ] ] ]&@JofP[ Chain[ 2, 2, 7 ] ]
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CROSSREFS
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Cf. A000372, A006360, A006361, A006362, A056932, A056933, A056935, A056936, A056937.
Sequence in context: A101705 A034620 A054562 this_sequence A003746 A050960 A142737
Adjacent sequences: A056931 A056932 A056933 this_sequence A056935 A056936 A056937
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KEYWORD
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nonn,easy
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AUTHOR
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Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu)
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