| n | a(n) |
|---|---|
| 2 | 15 |
| 3 | 145 |
| 4 | 670 |
| 5 | 2146 |
| 6 | 5501 |
| 7 | 12131 |
| 8 | 23996 |
| 9 | 43716 |
| 10 | 74667 |
| 11 | 121077 |
| 12 | 188122 |
| 13 | 282022 |
| 14 | 410137 |
| 15 | 581063 |
| 16 | 804728 |
| 17 | 1092488 |
| 18 | 1457223 |
| 19 | 1913433 |
| 20 | 2477334 |
| 21 | 3166954 |
| 22 | 4002229 |
| 23 | 5005099 |
| 24 | 6199604 |
| 25 | 7611980 |
| 26 | 9270755 |
| 27 | 11206845 |
| 28 | 13453650 |
| 29 | 16047150 |
[15,145,670,2146,5501,12131,23996,43716,74667, 121077,188122,282022,410137,581063,804728,1092488, 1457223,1913433,2477334,3166954,4002229,5005099, 6199604,7611980,9270755,11206845,13453650, 16047150] |