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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 16 |
| 5 | 36 |
| 6 | 79 |
| 7 | 170 |
| 8 | 362 |
| 9 | 767 |
| 10 | 1619 |
| 11 | 3402 |
| 12 | 7112 |
| 13 | 14797 |
| 14 | 30673 |
| 15 | 63427 |
| 16 | 130951 |
| 17 | 270031 |
| 18 | 556111 |
| 19 | 1143537 |
| 20 | 2347476 |
| 21 | 4810758 |
| 22 | 9843932 |
| 23 | 20118655 |
| 24 | 41081297 |
| 25 | 83832648 |
| 26 | 170987463 |
| 27 | 348581862 |
| 28 | 710242310 |
| 29 | 1446198858 |
[1,3,7,16,36,79,170,362,767,1619,3402,7112,14797, 30673,63427,130951,270031,556111,1143537,2347476, 4810758,9843932,20118655,41081297,83832648, 170987463,348581862,710242310,1446198858] |