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A147474 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 11 |
| 8 | 35 |
| 9 | 119 |
| 10 | 483 |
| 11 | 1553 |
| 12 | 7807 |
| 13 | 47813 |
| 14 | 363745 |
| 15 | 2696139 |
[1,1,1,1,1,3,11,35,119,483,1553,7807,47813,363745, 2696139] |