| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |
| 4 | 9 |
| 5 | 12 |
| 6 | 52 |
| 7 | 75 |
| 8 | 80 |
| 9 | 95 |
| 10 | 105 |
| 11 | 422 |
| 12 | 1002 |
| 13 | 2841 |
| 14 | 12165 |
| 15 | 16944 |
| 16 | 170997 |
| 17 | 430041 |
| 18 | 5844984 |
| 19 | 11095683 |
| 20 | 71438394 |
| 21 | 86938085 |
| 22 | 485470043 |
| 23 | 3341061731 |
| 24 | 11203279551 |
| 25 | 25053055391 |
| 26 | 29329179630 |
| 27 | 150058180590 |
| 28 | 278953774325 |
| 29 | 771115150044 |
[4,5,6,9,12,52,75,80,95,105,422,1002,2841,12165, 16944,170997,430041,5844984,11095683,71438394, 86938085,485470043,3341061731,11203279551, 25053055391,29329179630,150058180590,278953774325, 771115150044] |