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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 17 |
| 6 | 9 |
| 7 | 8 |
| 8 | 137 |
| 9 | 74 |
| 10 | 27 |
| 11 | 21 |
| 12 | 948 |
| 13 | 1740 |
| 14 | 315 |
| 15 | 81 |
| 16 | 55 |
| 17 | 6975 |
| 18 | 31167 |
| 19 | 22759 |
| 20 | 1343 |
| 21 | 243 |
| 22 | 144 |
| 23 | 50323 |
| 24 | 614818 |
| 25 | 1082472 |
| 26 | 297099 |
| 27 | 5734 |
| 28 | 729 |
| 29 | 377 |
| 30 | 366170 |
| 31 | 11900005 |
| 32 | 57946241 |
| 33 | 37368831 |
| 34 | 3882566 |
| 35 | 24495 |
| 36 | 2187 |
| 37 | 987 |
| 38 | 2657785 |
| 39 | 232002949 |
| 40 | 3045772177 |
[1,1,3,3,17,9,8,137,74,27,21,948,1740,315,81,55, 6975,31167,22759,1343,243,144,50323,614818, 1082472,297099,5734,729,377,366170,11900005, 57946241,37368831,3882566,24495,2187,987,2657785, 232002949,3045772177] |