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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 190 |
| 3 | 404 |
| 4 | 861 |
| 5 | 2195 |
| 6 | 9966 |
| 7 | 46884 |
| 8 | 184156 |
| 9 | 819263 |
| 10 | 3703730 |
| 11 | 15865269 |
| 12 | 69944965 |
| 13 | 310937380 |
| 14 | 1361781447 |
| 15 | 5998215467 |
| 16 | 26503896368 |
| 17 | 116659469704 |
| 18 | 513984726015 |
| 19 | 2266966511804 |
| 20 | 9989194862172 |
| 21 | 44021107304800 |
| 22 | 194059543279029 |
[64,190,404,861,2195,9966,46884,184156,819263, 3703730,15865269,69944965,310937380,1361781447, 5998215467,26503896368,116659469704,513984726015, 2266966511804,9989194862172,44021107304800, 194059543279029] |