434112

Appears in sequences

• Number of paths from (0,0) to (n,n) that use E(1,0) and N(0,1) as steps and have even number of East steps below the line y=x-1.at n=11A268213
• Maximum number of copies of a 12345 permutation pattern in an alternating (or zig-zag) permutation of length n + 7.at n=31A339355