61513

Appears in sequences

• Composite numbers which in base 8 contain their largest proper factor as a substring.at n=9A063167
• Duplicate of A063167.at n=9A063878
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1111 pattern in any orientation.at n=9A146231
• Number of 4 X n 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.at n=19A223951