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| n | a(n) |
|---|---|
| 1 | 1189 |
| 2 | 4226 |
| 3 | 12840 |
| 4 | 29463 |
| 5 | 110665 |
| 6 | 355574 |
| 7 | 840655 |
| 8 | 3260707 |
| 9 | 10744547 |
| 10 | 25508207 |
| 11 | 101193115 |
| 12 | 338681148 |
| 13 | 802629085 |
| 14 | 3232141280 |
| 15 | 10932868939 |
| 16 | 25796432709 |
| 17 | 105008159655 |
| 18 | 358017641465 |
| 19 | 839978667582 |
| 20 | 3448701353842 |
| 21 | 11833026855353 |
[1189,4226,12840,29463,110665,355574,840655, 3260707,10744547,25508207,101193115,338681148, 802629085,3232141280,10932868939,25796432709, 105008159655,358017641465,839978667582, 3448701353842,11833026855353] |