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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 29 |
| 5 | 73 |
| 6 | 191 |
| 7 | 479 |
| 8 | 1201 |
| 9 | 3011 |
| 10 | 7529 |
| 11 | 18839 |
| 12 | 47111 |
| 13 | 117779 |
| 14 | 294461 |
| 15 | 736159 |
| 16 | 1840429 |
| 17 | 4601099 |
| 18 | 11502779 |
| 19 | 28756957 |
| 20 | 71892397 |
| 21 | 179730997 |
| 22 | 449327503 |
| 23 | 1123318769 |
| 24 | 2808296923 |
| 25 | 7020742321 |
| 26 | 17551855831 |
| 27 | 43879639613 |
| 28 | 109699099033 |
[1,3,11,29,73,191,479,1201,3011,7529,18839,47111, 117779,294461,736159,1840429,4601099,11502779, 28756957,71892397,179730997,449327503,1123318769, 2808296923,7020742321,17551855831,43879639613, 109699099033] |