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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 27 |
| 4 | 31 |
| 5 | 575 |
| 6 | 669 |
| 7 | 1201 |
| 8 | 2505 |
| 9 | 4784 |
| 10 | 7618 |
| 11 | 35710 |
| 12 | 65005 |
| 13 | 166422 |
| 14 | 870062 |
| 15 | 994086 |
| 16 | 1105670 |
| 17 | 1209538 |
| 18 | 2140133 |
| 19 | 3020610 |
| 20 | 9147713 |
| 21 | 9404277 |
| 22 | 14492743 |
| 23 | 16792162 |
| 24 | 18566766 |
| 25 | 19445469 |
| 26 | 21264479 |
| 27 | 46483343 |
| 28 | 109424090 |
| 29 | 292374429 |
| 30 | 293351547 |
| 31 | 362681674 |
| 32 | 399576585 |
| 33 | 450622855 |
[4,8,27,31,575,669,1201,2505,4784,7618,35710, 65005,166422,870062,994086,1105670,1209538, 2140133,3020610,9147713,9404277,14492743,16792162, 18566766,19445469,21264479,46483343,109424090, 292374429,293351547,362681674,399576585,450622855] |