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| n | a(n) |
|---|---|
| 1 | 1042 |
| 2 | 2817 |
| 3 | 7031 |
| 4 | 17762 |
| 5 | 58239 |
| 6 | 156499 |
| 7 | 437805 |
| 8 | 1506801 |
| 9 | 4136820 |
| 10 | 11865455 |
| 11 | 41976597 |
| 12 | 116407007 |
| 13 | 337378745 |
| 14 | 1211267119 |
| 15 | 3374947162 |
| 16 | 9828010763 |
| 17 | 35545348591 |
| 18 | 99260624406 |
| 19 | 289689365514 |
| 20 | 1051432471689 |
| 21 | 2939191705954 |
[1042,2817,7031,17762,58239,156499,437805,1506801, 4136820,11865455,41976597,116407007,337378745, 1211267119,3374947162,9828010763,35545348591, 99260624406,289689365514,1051432471689, 2939191705954] |