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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 15 |
| 3 | 39 |
| 4 | 255 |
| 5 | 627 |
| 6 | 939 |
| 7 | 1431 |
| 8 | 1581 |
| 9 | 2409 |
| 10 | 3459 |
| 11 | 4797 |
| 12 | 14289 |
| 13 | 20619 |
| 14 | 30987 |
| 15 | 31935 |
| 16 | 43791 |
| 17 | 57291 |
| 18 | 68991 |
| 19 | 71193 |
| 20 | 73749 |
| 21 | 74841 |
| 22 | 94671 |
| 23 | 120669 |
| 24 | 121227 |
| 25 | 132297 |
| 26 | 148161 |
| 27 | 162843 |
| 28 | 196449 |
| 29 | 200787 |
| 30 | 209451 |
| 31 | 217191 |
| 32 | 302907 |
| 33 | 308937 |
| 34 | 434733 |
| 35 | 439959 |
| 36 | 455961 |
| 37 | 466701 |
| 38 | 467109 |
[2,15,39,255,627,939,1431,1581,2409,3459,4797, 14289,20619,30987,31935,43791,57291,68991,71193, 73749,74841,94671,120669,121227,132297,148161, 162843,196449,200787,209451,217191,302907,308937, 434733,439959,455961,466701,467109] |