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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 517 |
| 3 | 8008 |
| 4 | 113113 |
| 5 | 1513876 |
| 6 | 19589389 |
| 7 | 247937536 |
| 8 | 3091276705 |
| 9 | 38140546444 |
| 10 | 467097608341 |
| 11 | 5689887004984 |
| 12 | 69041150918377 |
| 13 | 835356636400132 |
| 14 | 10086046124610973 |
| 15 | 121588456137536752 |
| 16 | 1464064614481015729 |
[1,28,517,8008,113113,1513876,19589389,247937536, 3091276705,38140546444,467097608341,5689887004984, 69041150918377,835356636400132,10086046124610973, 121588456137536752,1464064614481015729] |