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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 34 |
| 4 | 114 |
| 5 | 411 |
| 6 | 1380 |
| 7 | 4573 |
| 8 | 14650 |
| 9 | 45995 |
| 10 | 141296 |
| 11 | 426364 |
| 12 | 1265443 |
| 13 | 3698011 |
| 14 | 10657134 |
| 15 | 30312395 |
| 16 | 85183177 |
| 17 | 236681860 |
| 18 | 650686538 |
| 19 | 1771098691 |
| 20 | 4775571943 |
| 21 | 12762628737 |
| 22 | 33821018537 |
| 23 | 88909273699 |
| 24 | 231945942992 |
| 25 | 600700301298 |
| 26 | 1544897610261 |
| 27 | 3946762859175 |
| 28 | 10018454809275 |
| 29 | 25274880698255 |
[1,1,8,34,114,411,1380,4573,14650,45995,141296, 426364,1265443,3698011,10657134,30312395,85183177, 236681860,650686538,1771098691,4775571943, 12762628737,33821018537,88909273699,231945942992, 600700301298,1544897610261,3946762859175, 10018454809275,25274880698255] |