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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 9 |
| 9 | 73 |
| 10 | 361 |
| 11 | 1321 |
| 12 | 3961 |
| 13 | 10297 |
| 14 | 24025 |
| 15 | 51481 |
| 16 | 103081 |
| 17 | 196521 |
| 18 | 368425 |
| 19 | 720937 |
| 20 | 1589161 |
| 21 | 4069801 |
| 22 | 11511721 |
| 23 | 33341353 |
| 24 | 94142313 |
| 25 | 253860201 |
| 26 | 650564201 |
| 27 | 1588228228 |
| 28 | 3716917597 |
| 29 | 8418378043 |
| 30 | 18699454621 |
| 31 | 41451042556 |
| 32 | 93508305513 |
| 33 | 218218347865 |
| 34 | 530189399785 |
[1,1,1,1,1,1,1,1,9,73,361,1321,3961,10297,24025, 51481,103081,196521,368425,720937,1589161,4069801, 11511721,33341353,94142313,253860201,650564201, 1588228228,3716917597,8418378043,18699454621, 41451042556,93508305513,218218347865,530189399785] |