2097111

Appears in sequences

• 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=20A183155
• Number of binary digits in the high-water marks of the terms of the continued fraction of the base-2 Champernowne constant.at n=20A244331
• The real part of b(n) where b(n) = (n + b(n-1)) * (1 + i) with b(-1)=0; i = sqrt(-1).at n=41A309878
• The difference between number of even and number of odd Grassmannian permutations of size n.at n=41A356185