507935

Appears in sequences

• Numbers whose binary representation is the concatenation of n 1's, 2n-1 digits 0 and n 1's.at n=4A147539
• a(n) = n*(n + 1)*(n + 2)*(4*n - 3)/6.at n=29A264851
• Number of length-6 0..n arrays with no repeated value differing from the previous repeated value by more than one.at n=7A269586