Number of nontrivial Baxter permutations of length 2n-1.

A001185

Number of nontrivial Baxter permutations of length 2n-1.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =7a(4) =21a(5) =112a(6) =456a(7) =2603a(8) =13203

External references