268435401

Appears in sequences

• a(n) = 4*A061547(n+1) - 3*A166753(n).at n=26A166754
• The number of order-preserving partial isometries (of an n-chain) of fix zero (fix of alpha = 0). Equivalently, the number of order-preserving partial derangement isometries (of an n-chain).at n=27A183155