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Search: id:A092608
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| A092608 |
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Number of connected ordered 5-element T_0-antichains on an unlabeled n-set. |
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+0
1
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| 0, 0, 0, 0, 30, 1945, 41901, 410505, 2363160, 9266220, 27058460, 62261590, 117178540, 185037520, 249548910, 290969170, 295695540, 263173865, 205581235, 140943485, 84636895, 44347105, 20159615, 7888705, 2629575, 736281, 169911, 31465, 4495, 465, 31, 1
(list; graph; listen)
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OFFSET
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0,5
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REFERENCES
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G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.
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FORMULA
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O.g.f.: 5!*A(ln(1+x)), where A(x) is e.g.f. for A094036.
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CROSSREFS
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Sequence in context: A042743 A042740 A112003 this_sequence A092617 A056093 A056070
Adjacent sequences: A092605 A092606 A092607 this_sequence A092609 A092610 A092611
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KEYWORD
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fini,full,nonn
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AUTHOR
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Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 22 2004
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