A181372 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 3 | | 6 |
| | | | | | | | 6 | | 27 | | 24 |
| | | | | | | 10 | | 72 | | 162 | | 80 |
| | | | | | 15 | | 150 | | 576 | | 810 | | 240 |
| | | | | 21 | | 270 | | 1500 | | 3840 | | 3645 | | 672 |
| | | | 28 | | 441 | | 3240 | | 12500 | | 23040 | | 15309 | | 1792 |
| | | 36 | | 672 | | 6174 | | 32400 | | 93750 | | 129024 | | 61236 | | 4608 |
| | 45 | | 972 | | 10752 | | 72030 | | 291600 | | 656250 | | 688128 | | 236196 | | 11520 |
|
A181372 as a square array
1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45
| 6 | 27 | 72 | 150 | 270 | 441 | 672 | 972
| 24 | 162 | 576 | 1500 | 3240 | 6174 | 10752
| 80 | 810 | 3840 | 12500 | 32400 | 72030
| 240 | 3645 | 23040 | 93750 | 291600
| 672 | 15309 | 129024 | 656250
| 1792 | 61236 | 688128
| 4608 | 236196
| 11520
|
A181372 as an upper right triangle
1 | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45
| | 6 | 27 | 72 | 150 | 270 | 441 | 672 | 972
| | | 24 | 162 | 576 | 1500 | 3240 | 6174 | 10752
| | | | 80 | 810 | 3840 | 12500 | 32400 | 72030
| | | | | 240 | 3645 | 23040 | 93750 | 291600
| | | | | | 672 | 15309 | 129024 | 656250
| | | | | | | 1792 | 61236 | 688128
| | | | | | | | 4608 | 236196
| | | | | | | | | 11520
|
|