A258993 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 3 |
| | | | | | | | | | 1 | | 6 | | 5 |
| | | | | | | | | 1 | | 10 | | 15 | | 7 |
| | | | | | | | 1 | | 15 | | 35 | | 28 | | 9 |
| | | | | | | 1 | | 21 | | 70 | | 84 | | 45 | | 11 |
| | | | | | 1 | | 28 | | 126 | | 210 | | 165 | | 66 | | 13 |
| | | | | 1 | | 36 | | 210 | | 462 | | 495 | | 286 | | 91 | | 15 |
| | | | 1 | | 45 | | 330 | | 924 | | 1287 | | 1001 | | 455 | | 120 | | 17 |
| | | 1 | | 55 | | 495 | | 1716 | | 3003 | | 3003 | | 1820 | | 680 | | 153 | | 19 |
| | 1 | | 66 | | 715 | | 3003 | | 6435 | | 8008 | | 6188 | | 3060 | | 969 | | 190 | | 21 |
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A258993 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66
| 5 | 15 | 35 | 70 | 126 | 210 | 330 | 495 | 715
| 7 | 28 | 84 | 210 | 462 | 924 | 1716 | 3003
| 9 | 45 | 165 | 495 | 1287 | 3003 | 6435
| 11 | 66 | 286 | 1001 | 3003 | 8008
| 13 | 91 | 455 | 1820 | 6188
| 15 | 120 | 680 | 3060
| 17 | 153 | 969
| 19 | 190
| 21
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A258993 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 3 | 6 | 10 | 15 | 21 | 28 | 36 | 45 | 55 | 66
| | | 5 | 15 | 35 | 70 | 126 | 210 | 330 | 495 | 715
| | | | 7 | 28 | 84 | 210 | 462 | 924 | 1716 | 3003
| | | | | 9 | 45 | 165 | 495 | 1287 | 3003 | 6435
| | | | | | 11 | 66 | 286 | 1001 | 3003 | 8008
| | | | | | | 13 | 91 | 455 | 1820 | 6188
| | | | | | | | 15 | 120 | 680 | 3060
| | | | | | | | | 17 | 153 | 969
| | | | | | | | | | 19 | 190
| | | | | | | | | | | 21
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