Table 2 Cyclic Eulerian numbers A(l, k), where k is the size of the loop and l the number of ascents
From: Inherent directionality explains the lack of feedback loops in empirical networks
k l | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|
1 | 1 | ||||||||
2 | 2 | ||||||||
3 | 3 | 3 | |||||||
4 | 4 | 16 | 4 | ||||||
5 | 5 | 55 | 55 | 5 | |||||
6 | 6 | 156 | 396 | 156 | 6 | ||||
7 | 7 | 399 | 2114 | 2114 | 399 | 7 | |||
8 | 8 | 960 | 9528 | 19328 | 9528 | 960 | 8 | ||
9 | 9 | 2223 | 38637 | 140571 | 140571 | 38637 | 2223 | 9 |
