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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 231 |
| 3 | 1035 |
| 4 | 6786 |
| 5 | 190036 |
| 6 | 193131 |
| 7 | 766941 |
| 8 | 1237951 |
| 9 | 1348903 |
| 10 | 3069003 |
| 11 | 3396921 |
| 12 | 8034036 |
| 13 | 9152781 |
| 14 | 11875501 |
| 15 | 15694003 |
| 16 | 28001386 |
| 17 | 29587278 |
| 18 | 35149920 |
| 19 | 61643856 |
| 20 | 63196903 |
| 21 | 130758706 |
| 22 | 178161126 |
| 23 | 198214005 |
| 24 | 227751153 |
| 25 | 268111746 |
| 26 | 339210081 |
| 27 | 402102261 |
| 28 | 654224878 |
[1,231,1035,6786,190036,193131,766941,1237951, 1348903,3069003,3396921,8034036,9152781,11875501, 15694003,28001386,29587278,35149920,61643856, 63196903,130758706,178161126,198214005,227751153, 268111746,339210081,402102261,654224878] |