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| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 1650 |
| 3 | 20240 |
| 4 | 118280 |
| 5 | 462234 |
| 6 | 1402934 |
| 7 | 3579520 |
| 8 | 8046928 |
| 9 | 16426926 |
| 10 | 31082698 |
| 11 | 55316976 |
| 12 | 93593720 |
| 13 | 151783346 |
| 14 | 237431502 |
| 15 | 360051392 |
| 16 | 531439648 |
| 17 | 766015750 |
| 18 | 1081184994 |
| 19 | 1497725008 |
| 20 | 2040195816 |
| 21 | 2737373450 |
| 22 | 3622707110 |
| 23 | 4734799872 |
[22,1650,20240,118280,462234,1402934,3579520, 8046928,16426926,31082698,55316976,93593720, 151783346,237431502,360051392,531439648,766015750, 1081184994,1497725008,2040195816,2737373450, 3622707110,4734799872] |