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| n | a(n) |
|---|---|
| 1 | 2703 |
| 2 | 12324 |
| 3 | 55667 |
| 4 | 238740 |
| 5 | 1038340 |
| 6 | 4546393 |
| 7 | 19754506 |
| 8 | 85550331 |
| 9 | 370307568 |
| 10 | 1600037880 |
| 11 | 6905546384 |
| 12 | 29753763842 |
| 13 | 128038285985 |
| 14 | 550179273386 |
| 15 | 2361021857130 |
| 16 | 10118806677168 |
| 17 | 43313794030418 |
| 18 | 185189314116533 |
[2703,12324,55667,238740,1038340,4546393,19754506, 85550331,370307568,1600037880,6905546384, 29753763842,128038285985,550179273386, 2361021857130,10118806677168,43313794030418, 185189314116533] |