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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 174 |
| 3 | 1177 |
| 4 | 7481 |
| 5 | 46853 |
| 6 | 265581 |
| 7 | 1371532 |
| 8 | 6477799 |
| 9 | 28186736 |
| 10 | 113797303 |
| 11 | 429229381 |
| 12 | 1522307251 |
| 13 | 5106384889 |
| 14 | 16285979144 |
| 15 | 49619743791 |
| 16 | 145033371213 |
| 17 | 408217994491 |
| 18 | 1110183398793 |
| 19 | 2926141105334 |
| 20 | 7495234690866 |
| 21 | 18704470939705 |
[64,174,1177,7481,46853,265581,1371532,6477799, 28186736,113797303,429229381,1522307251, 5106384889,16285979144,49619743791,145033371213, 408217994491,1110183398793,2926141105334, 7495234690866,18704470939705] |