显示1-1个结果(共1个)。
第页1
跨越最多n个顶点且没有单个边的未标记杂波(连接的反链)的数量。
+0 7
1, 1, 2, 5, 19, 176, 16118, 489996568
例子
a(3)=5杂波的非同态代表:
{}
{{1,2}}
{{1,2,3}}
{{1,3},{2,3}}
{{1,2},{1,3},{2,3}}
a(4)=19杂波的非同态代表:
{}
{{1,2}}
{{1,2,3}}
{{1,2,3,4}}
{{1,3},{2,3}}
{{1,4},{2,3,4}}
{{1,3,4},{2,3,4}}
{{1,2},{1,3},{2,3}}
{{1,2},{1,3,4},{2,3,4}}
{{1,3},{1,4},{2,3,4}}
{{1,3},{2,4},{3,4}}
{{1,4},{2,4},{3,4}}
{{1,2,4},{1,3,4},{2,3,4}}
{{1,2},{1,3},{1,4},{2,3,4}}
{{1,2},{1,3},{2,4},{3,4}}
{{1,4},{2,3},{2,4},{3,4}}
{{1,2,3},{1,2,4},{1,3,4},{2,3,4}}
{{1,3},{1,4},{2,3},{2,4},{3,4}}
{{1,2},{1,3},{1,4},{2,3},{2,4},{3,4}}
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