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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 1007 |
| 3 | 5360 |
| 4 | 35567 |
| 5 | 155102 |
| 6 | 562559 |
| 7 | 1786114 |
| 8 | 4984385 |
| 9 | 12779966 |
| 10 | 30245569 |
| 11 | 67041880 |
| 12 | 140742983 |
| 13 | 281169008 |
| 14 | 538998923 |
| 15 | 995176292 |
| 16 | 1777352885 |
| 17 | 3082346868 |
| 18 | 5202996925 |
| 19 | 8574228434 |
| 20 | 13820760479 |
| 21 | 21832252746 |
| 22 | 33858093487 |
| 23 | 51616202234 |
[2,1007,5360,35567,155102,562559,1786114,4984385, 12779966,30245569,67041880,140742983,281169008, 538998923,995176292,1777352885,3082346868, 5202996925,8574228434,13820760479,21832252746, 33858093487,51616202234] |