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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 28 |
| 6 | 76 |
| 7 | 151 |
| 8 | 412 |
| 9 | 1239 |
| 10 | 2689 |
| 11 | 7724 |
| 12 | 16351 |
| 13 | 46607 |
| 14 | 98276 |
| 15 | 280035 |
| 16 | 871218 |
| 17 | 1967577 |
| 18 | 5819850 |
| 19 | 12749014 |
| 20 | 37260985 |
| 21 | 118163637 |
| 22 | 272787542 |
| 23 | 819934670 |
| 24 | 1829959304 |
| 25 | 5422130623 |
| 26 | 11963162678 |
| 27 | 35243160809 |
| 28 | 112614062317 |
| 29 | 262572197079 |
| 30 | 795710438547 |
| 31 | 1794155974237 |
[1,2,5,14,28,76,151,412,1239,2689,7724,16351, 46607,98276,280035,871218,1967577,5819850, 12749014,37260985,118163637,272787542,819934670, 1829959304,5422130623,11963162678,35243160809, 112614062317,262572197079,795710438547, 1794155974237] |