81441

Appears in sequences

• Number of binary rooted trees with n nodes and height at most 8.at n=19A036591
• Numbers whose base-5 representation has exactly 8 runs.at n=25A043608
• Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.at n=3A252597
• Number of (n+2)X(4+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.at n=3A252601
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.at n=24A252605
• Numbers n such that the sum of the divisors of n is of the form m^2+1.at n=9A289290