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| n | a(n) |
|---|---|
| 1 | 390 |
| 2 | 2586 |
| 3 | 17114 |
| 4 | 106184 |
| 5 | 645208 |
| 6 | 4152180 |
| 7 | 26549772 |
| 8 | 165983800 |
| 9 | 1030960714 |
| 10 | 6559482790 |
| 11 | 41617435108 |
| 12 | 261155702658 |
| 13 | 1635429768844 |
| 14 | 10351073058430 |
| 15 | 65443794339874 |
| 16 | 411533381973194 |
| 17 | 2586183990959816 |
| 18 | 16330252501785100 |
[390,2586,17114,106184,645208,4152180,26549772, 165983800,1030960714,6559482790,41617435108, 261155702658,1635429768844,10351073058430, 65443794339874,411533381973194,2586183990959816, 16330252501785100] |