55130625

Appears in sequences

• Number of (n+2)X5 binary arrays avoiding patterns 001 and 011 in rows and columns.at n=13A202095
• Number of (n+1)X(4+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.at n=14A250428
• Odd numbers k such that sigma(k) > 2*k and A003415(sigma(k)) < k, where A003415 is the arithmetic derivative, and sigma is the sum of divisors function.at n=20A347890