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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 10 |
| 5 | 24 |
| 6 | 56 |
| 7 | 135 |
| 8 | 332 |
| 9 | 826 |
| 10 | 2084 |
| 11 | 5310 |
| 12 | 13652 |
| 13 | 35372 |
| 14 | 92262 |
| 15 | 242081 |
| 16 | 638514 |
| 17 | 1692036 |
| 18 | 4502674 |
| 19 | 12027492 |
| 20 | 32238194 |
| 21 | 86681150 |
| 22 | 233733662 |
| 23 | 631915388 |
| 24 | 1712568790 |
| 25 | 4651671690 |
| 26 | 12661092950 |
| 27 | 34527973186 |
| 28 | 94330427526 |
| 29 | 258143998494 |
| 30 | 707547095008 |
| 31 | 1942180671839 |
[1,2,5,10,24,56,135,332,826,2084,5310,13652,35372, 92262,242081,638514,1692036,4502674,12027492, 32238194,86681150,233733662,631915388,1712568790, 4651671690,12661092950,34527973186,94330427526, 258143998494,707547095008,1942180671839] |