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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 150 |
| 4 | 2210 |
| 5 | 41642 |
| 6 | 956878 |
| 7 | 25955630 |
| 8 | 811819826 |
| 9 | 28764498386 |
| 10 | 1138755852990 |
| 11 | 49817190098694 |
| 12 | 2386544217733906 |
| 13 | 124257113538066522 |
| 14 | 6986465328614267742 |
| 15 | 421887743219324342110 |
| 16 | 27231714819135144778722 |
| 17 | 1871047822756547798671074 |
[1,2,14,150,2210,41642,956878,25955630,811819826, 28764498386,1138755852990,49817190098694, 2386544217733906,124257113538066522, 6986465328614267742,421887743219324342110, 27231714819135144778722,1871047822756547798671074] |