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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1026 |
| 3 | 61100 |
| 4 | 1169750 |
| 5 | 12044025 |
| 6 | 83384476 |
| 7 | 437200176 |
| 8 | 1864757700 |
| 9 | 6779099625 |
| 10 | 21693441550 |
| 11 | 62545208076 |
| 12 | 165314338826 |
| 13 | 405941961425 |
| 14 | 935824239000 |
| 15 | 2042356907200 |
| 16 | 4248401203176 |
| 17 | 8470439399601 |
| 18 | 16262944822650 |
| 19 | 30186516503500 |
| 20 | 54350088184350 |
| 21 | 95193540843401 |
| 22 | 162596916293876 |
| 23 | 271426802958000 |
| 24 | 443660070587500 |
[1,1026,61100,1169750,12044025,83384476,437200176, 1864757700,6779099625,21693441550,62545208076, 165314338826,405941961425,935824239000, 2042356907200,4248401203176,8470439399601, 16262944822650,30186516503500,54350088184350, 95193540843401,162596916293876,271426802958000, 443660070587500] |