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| n | a(n) |
|---|---|
| 0 | 18 |
| 1 | 19 |
| 2 | 37 |
| 3 | 56 |
| 4 | 93 |
| 5 | 3404 |
| 6 | 3497 |
| 7 | 6901 |
| 8 | 10398 |
| 9 | 17299 |
| 10 | 633162 |
| 11 | 650461 |
| 12 | 1283623 |
| 13 | 1934084 |
| 14 | 3217707 |
| 15 | 117771536 |
| 16 | 120989243 |
| 17 | 238760779 |
| 18 | 359750022 |
| 19 | 598510801 |
| 20 | 21906138858 |
| 21 | 22504649659 |
| 22 | 44410788517 |
| 23 | 66915438176 |
| 24 | 111326226693 |
| 25 | 4074659599124 |
| 26 | 4185985825817 |
[18,19,37,56,93,3404,3497,6901,10398,17299,633162, 650461,1283623,1934084,3217707,117771536, 120989243,238760779,359750022,598510801, 21906138858,22504649659,44410788517,66915438176, 111326226693,4074659599124,4185985825817] |