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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 26 |
| 5 | 43 |
| 6 | 109 |
| 7 | 301 |
| 8 | 649 |
| 9 | 1332 |
| 10 | 3124 |
| 11 | 7545 |
| 12 | 16925 |
| 13 | 37301 |
| 14 | 85611 |
| 15 | 198538 |
| 16 | 450262 |
| 17 | 1014883 |
| 18 | 2315761 |
| 19 | 5303161 |
| 20 | 12062833 |
| 21 | 27380904 |
| 22 | 62381096 |
| 23 | 142295761 |
| 24 | 323928537 |
| 25 | 736878729 |
| 26 | 1678132851 |
| 27 | 3823284742 |
| 28 | 8705263890 |
| 29 | 19816325051 |
| 30 | 45124192277 |
[1,3,14,26,43,109,301,649,1332,3124,7545,16925, 37301,85611,198538,450262,1014883,2315761,5303161, 12062833,27380904,62381096,142295761,323928537, 736878729,1678132851,3823284742,8705263890, 19816325051,45124192277] |