| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 34 |
| 3 | 259 |
| 4 | 1092 |
| 5 | 3333 |
| 6 | 8294 |
| 7 | 17927 |
| 8 | 34952 |
| 9 | 62985 |
| 10 | 106666 |
| 11 | 171787 |
| 12 | 265420 |
| 13 | 396045 |
| 14 | 573678 |
| 15 | 809999 |
| 16 | 1118480 |
| 17 | 1514513 |
| 18 | 2015538 |
| 19 | 2641171 |
| 20 | 3413332 |
| 21 | 4356373 |
| 22 | 5497206 |
| 23 | 6865431 |
| 24 | 8493464 |
| 25 | 10416665 |
| 26 | 12673466 |
| 27 | 15305499 |
| 28 | 18357724 |
| 29 | 21878557 |
| 30 | 25919998 |
[1,34,259,1092,3333,8294,17927,34952,62985,106666, 171787,265420,396045,573678,809999,1118480, 1514513,2015538,2641171,3413332,4356373,5497206, 6865431,8493464,10416665,12673466,15305499, 18357724,21878557,25919998] |