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| n | a(n) |
|---|---|
| 1 | 50 |
| 2 | 447 |
| 3 | 2072 |
| 4 | 6797 |
| 5 | 17986 |
| 6 | 41083 |
| 7 | 84288 |
| 8 | 159321 |
| 9 | 282274 |
| 10 | 474551 |
| 11 | 763896 |
| 12 | 1185509 |
| 13 | 1783250 |
| 14 | 2610931 |
| 15 | 3733696 |
| 16 | 5229489 |
| 17 | 7190610 |
| 18 | 9725359 |
| 19 | 12959768 |
| 20 | 17039421 |
| 21 | 22131362 |
| 22 | 28426091 |
| 23 | 36139648 |
| 24 | 45515785 |
| 25 | 56828226 |
| 26 | 70383015 |
| 27 | 86520952 |
[50,447,2072,6797,17986,41083,84288,159321,282274, 474551,763896,1185509,1783250,2610931,3733696, 5229489,7190610,9725359,12959768,17039421, 22131362,28426091,36139648,45515785,56828226, 70383015,86520952] |