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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | 38 |
| 4 | 303 |
| 5 | 2390 |
| 6 | 19593 |
| 7 | 166032 |
| 8 | 1440186 |
| 9 | 12711333 |
| 10 | 113761326 |
| 11 | 1029509896 |
| 12 | 9401974132 |
| 13 | 86516371101 |
[0,5,38,303,2390,19593,166032,1440186,12711333, 113761326,1029509896,9401974132,86516371101] |