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| n | a(n) |
|---|---|
| 1 | 22 |
| 2 | 218 |
| 3 | 1232 |
| 4 | 5219 |
| 5 | 18502 |
| 6 | 57911 |
| 7 | 164781 |
| 8 | 433762 |
| 9 | 1068664 |
| 10 | 2485274 |
| 11 | 5492414 |
| 12 | 11598655 |
| 13 | 23514508 |
| 14 | 45950300 |
| 15 | 86850332 |
| 16 | 159256653 |
| 17 | 284063565 |
| 18 | 494009870 |
| 19 | 839363352 |
| 20 | 1395884951 |
| 21 | 2275822878 |
| 22 | 3642884361 |
| 23 | 5732370123 |
| 24 | 8877939920 |
[22,218,1232,5219,18502,57911,164781,433762, 1068664,2485274,5492414,11598655,23514508, 45950300,86850332,159256653,284063565,494009870, 839363352,1395884951,2275822878,3642884361, 5732370123,8877939920] |