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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 29 |
| 3 | 263 |
| 4 | 2369 |
| 5 | 21323 |
| 6 | 191908 |
| 7 | 1727173 |
| 8 | 15544558 |
| 9 | 139901023 |
| 10 | 1259109208 |
| 11 | 11331982873 |
| 12 | 101987845858 |
| 13 | 917890612731 |
| 14 | 8261015514587 |
| 15 | 74349139631290 |
| 16 | 669142256681616 |
| 17 | 6022280310134550 |
| 18 | 54200522791210955 |
| 19 | 487804705120898599 |
| 20 | 4390242346088087395 |
[3,29,263,2369,21323,191908,1727173,15544558, 139901023,1259109208,11331982873,101987845858, 917890612731,8261015514587,74349139631290, 669142256681616,6022280310134550, 54200522791210955,487804705120898599, 4390242346088087395] |