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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 138 |
| 3 | 293 |
| 4 | 726 |
| 5 | 1648 |
| 6 | 3647 |
| 7 | 8031 |
| 8 | 17745 |
| 9 | 39427 |
| 10 | 87996 |
| 11 | 197061 |
| 12 | 442244 |
| 13 | 993767 |
| 14 | 2234762 |
| 15 | 5027590 |
| 16 | 11313252 |
| 17 | 25460562 |
| 18 | 57302892 |
| 19 | 128973259 |
| 20 | 290288833 |
| 21 | 653378497 |
| 22 | 1470622856 |
| 23 | 3310082220 |
| 24 | 7450351382 |
| 25 | 16769302007 |
| 26 | 37744471304 |
[16,138,293,726,1648,3647,8031,17745,39427,87996, 197061,442244,993767,2234762,5027590,11313252, 25460562,57302892,128973259,290288833,653378497, 1470622856,3310082220,7450351382,16769302007, 37744471304] |