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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 14 |
| 6 | 44 |
| 7 | 70 |
| 8 | 230 |
| 9 | 369 |
| 10 | 1242 |
| 11 | 2002 |
| 12 | 6853 |
| 13 | 11076 |
| 14 | 38376 |
| 15 | 62127 |
| 16 | 217242 |
| 17 | 352070 |
| 18 | 1239980 |
| 19 | 2010998 |
| 20 | 7123765 |
| 21 | 11559030 |
| 22 | 41141916 |
| 23 | 66780155 |
| 24 | 238637282 |
| 25 | 387444085 |
| 26 | 1389206210 |
| 27 | 2255875650 |
| 28 | 8112107475 |
| 29 | 13174629240 |
| 30 | 47495492400 |
[1,1,2,3,9,14,44,70,230,369,1242,2002,6853,11076, 38376,62127,217242,352070,1239980,2010998,7123765, 11559030,41141916,66780155,238637282,387444085, 1389206210,2255875650,8112107475,13174629240, 47495492400] |