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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 13 |
| 4 | 29 |
| 5 | 194 |
| 6 | 433 |
| 7 | 2897 |
| 8 | 6466 |
| 9 | 43261 |
| 10 | 96557 |
| 11 | 646018 |
| 12 | 1441889 |
| 13 | 9647009 |
| 14 | 21531778 |
| 15 | 144059117 |
| 16 | 321534781 |
| 17 | 2151239746 |
| 18 | 4801489937 |
| 19 | 32124537073 |
| 20 | 71700814274 |
| 21 | 479716816349 |
| 22 | 1070710724173 |
| 23 | 7163627708162 |
| 24 | 15988960048321 |
[1,2,13,29,194,433,2897,6466,43261,96557,646018, 1441889,9647009,21531778,144059117,321534781, 2151239746,4801489937,32124537073,71700814274, 479716816349,1070710724173,7163627708162, 15988960048321] |