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A370960
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a(n) = number of acyclic orientations of the complete tripartite graph K_{2,2,n}.
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4
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14, 78, 426, 2286, 12090, 63198, 327306, 1682766, 8601690, 43768638, 221910186, 1121897646, 5659111290, 28494757278, 143272715466, 719565670926, 3610655860890, 18104646725118, 90728875495146, 454467461514606, 2275631193410490, 11391336159448158, 57009415513961226, 285258058278100686, 1427134339747920090
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OFFSET
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0,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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