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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 118 |
| 3 | 1540 |
| 4 | 21286 |
| 5 | 304300 |
| 6 | 4443580 |
| 7 | 65830600 |
| 8 | 985483270 |
| 9 | 14869654300 |
| 10 | 225759595348 |
| 11 | 3444812388280 |
| 12 | 52781007848284 |
| 13 | 811510465220920 |
| 14 | 12513859077134008 |
| 15 | 193460383702061200 |
| 16 | 2997463389599395270 |
| 17 | 46532910920993515900 |
| 18 | 723626591914643806180 |
| 19 | 11270311875128088314200 |
[1,10,118,1540,21286,304300,4443580,65830600, 985483270,14869654300,225759595348,3444812388280, 52781007848284,811510465220920,12513859077134008, 193460383702061200,2997463389599395270, 46532910920993515900,723626591914643806180, 11270311875128088314200] |