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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 29 |
| 5 | 97 |
| 6 | 354 |
| 7 | 1300 |
| 8 | 5129 |
| 9 | 19092 |
| 10 | 77071 |
| 11 | 302902 |
| 12 | 1224459 |
| 13 | 4889175 |
| 14 | 20230479 |
| 15 | 81922468 |
| 16 | 339766702 |
| 17 | 1398618423 |
| 18 | 5853729563 |
| 19 | 24226447913 |
| 20 | 102042112312 |
| 21 | 426606797100 |
| 22 | 1802017383786 |
| 23 | 7573988021017 |
| 24 | 32177115099918 |
| 25 | 135889802109788 |
| 26 | 578695267283061 |
| 27 | 2456508103944632 |
| 28 | 10495089623826787 |
[1,1,3,8,29,97,354,1300,5129,19092,77071,302902, 1224459,4889175,20230479,81922468,339766702, 1398618423,5853729563,24226447913,102042112312, 426606797100,1802017383786,7573988021017, 32177115099918,135889802109788,578695267283061, 2456508103944632,10495089623826787] |