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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 12 |
| 5 | 15 |
| 6 | 21 |
| 7 | 30 |
| 8 | 78 |
| 9 | 93 |
| 10 | 160 |
| 11 | 244 |
| 12 | 490 |
| 13 | 574 |
| 14 | 1196 |
| 15 | 1275 |
| 16 | 1875 |
| 17 | 2590 |
| 18 | 5732 |
| 19 | 7344 |
| 20 | 9728 |
| 21 | 11918 |
| 22 | 13840 |
| 23 | 33945 |
| 24 | 100075 |
| 25 | 110922 |
| 26 | 117991 |
| 27 | 142440 |
[1,2,4,12,15,21,30,78,93,160,244,490,574,1196, 1275,1875,2590,5732,7344,9728,11918,13840,33945, 100075,110922,117991,142440] |