217167

Appears in sequences

• Engel expansion of sqrt(Pi/2).at n=9A067921
• Number of squares between powers of 2, floor(sqrt(2^(n+1))) - floor(sqrt(2^n)).at n=39A190568
• Number of triangular numbers T(k) between powers of 2, 2^(n-1) < T(k) <= 2^n.at n=38A190660