10498005

Appears in sequences

• a(n) is the number k such that 2^(2k+1)-1 = A000668(n+1).at n=38A146768
• a(n) = (T(n,n+1) - 1)/n^3 for n >= 1, where T(n,x) is the n-th Chebyshev polynomial of the first kind.at n=7A370259