ValleyTunnelSemilengthSum on DyckPath
The sum of the semilengths of the tunnels that end at a valley.
Called as CombinatorialStat(x, "ValleyTunnelSemilengthSum"). The head's page has its examples.
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FindStat St000476
The sum of the semi-lengths of tunnels before a valley of a Dyck path.
| Object | Value |
|---|---|
[1,0,1,0] | 1 |
[1,1,0,0] | 0 |
[1,0,1,0,1,0] | 2 |
[1,0,1,1,0,0] | 1 |
[1,1,0,0,1,0] | 2 |
[1,1,0,1,0,0] | 1 |
[1,1,1,0,0,0] | 0 |
[1,0,1,0,1,0,1,0] | 3 |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/St000476 has the rest.