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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 18 |
| 7 | 35 |
| 8 | 87 |
| 9 | 206 |
| 10 | 527 |
| 11 | 1337 |
| 12 | 3524 |
| 13 | 9262 |
| 14 | 24772 |
| 15 | 66402 |
| 16 | 179589 |
| 17 | 487435 |
| 18 | 1330708 |
| 19 | 3645754 |
| 20 | 10031143 |
| 21 | 27691894 |
| 22 | 76708835 |
| 23 | 213122892 |
| 24 | 593851624 |
| 25 | 1659104995 |
| 26 | 4646951873 |
| 27 | 13046181167 |
| 28 | 36708619646 |
| 29 | 103505545079 |
| 30 | 292430771955 |
| 31 | 827749791118 |
| 32 | 2347201206583 |
| 33 | 6667102499129 |
| 34 | 18968089092814 |
[1,1,2,4,7,18,35,87,206,527,1337,3524,9262,24772, 66402,179589,487435,1330708,3645754,10031143, 27691894,76708835,213122892,593851624,1659104995, 4646951873,13046181167,36708619646,103505545079, 292430771955,827749791118,2347201206583, 6667102499129,18968089092814] |