A022166 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 3 | | 1 |
| | | | | | | | 1 | | 7 | | 7 | | 1 |
| | | | | | | 1 | | 15 | | 35 | | 15 | | 1 |
| | | | | | 1 | | 31 | | 155 | | 155 | | 31 | | 1 |
| | | | | 1 | | 63 | | 651 | | 1395 | | 651 | | 63 | | 1 |
| | | | 1 | | 127 | | 2667 | | 11811 | | 11811 | | 2667 | | 127 | | 1 |
| | | 1 | | 255 | | 10795 | | 97155 | | 200787 | | 97155 | | 10795 | | 255 | | 1 |
| | 1 | | 511 | | 43435 | | 788035 | | 3309747 | | 3309747 | | 788035 | | 43435 | | 511 | | 1 |
|
A022166 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 7 | 15 | 31 | 63 | 127 | 255 | 511
| | 1 | 7 | 35 | 155 | 651 | 2667 | 10795 | 43435
| | 1 | 15 | 155 | 1395 | 11811 | 97155 | 788035
| | 1 | 31 | 651 | 11811 | 200787 | 3309747
| | 1 | 63 | 2667 | 97155 | 3309747
| | 1 | 127 | 10795 | 788035
| | 1 | 255 | 43435
| | 1 | 511
| | 1
|
A022166 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 7 | 15 | 31 | 63 | 127 | 255 | 511
| | | 1 | 7 | 35 | 155 | 651 | 2667 | 10795 | 43435
| | | | 1 | 15 | 155 | 1395 | 11811 | 97155 | 788035
| | | | | 1 | 31 | 651 | 11811 | 200787 | 3309747
| | | | | | 1 | 63 | 2667 | 97155 | 3309747
| | | | | | | 1 | 127 | 10795 | 788035
| | | | | | | | 1 | 255 | 43435
| | | | | | | | | 1 | 511
| | | | | | | | | | 1
|
|
