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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 20 |
| 4 | 49 |
| 5 | 99 |
| 6 | 176 |
| 7 | 286 |
| 8 | 435 |
| 9 | 629 |
| 10 | 874 |
| 11 | 1176 |
| 12 | 1541 |
| 13 | 1975 |
| 14 | 2484 |
| 15 | 3074 |
| 16 | 3751 |
| 17 | 4521 |
| 18 | 5390 |
| 19 | 6364 |
| 20 | 7449 |
| 21 | 8651 |
| 22 | 9976 |
| 23 | 11430 |
| 24 | 13019 |
| 25 | 14749 |
| 26 | 16626 |
| 27 | 18656 |
| 28 | 20845 |
| 29 | 23199 |
| 30 | 25724 |
| 31 | 28426 |
| 32 | 31311 |
| 33 | 34385 |
| 34 | 37654 |
| 35 | 41124 |
| 36 | 44801 |
| 37 | 48691 |
| 38 | 52800 |
| 39 | 57134 |
[1,6,20,49,99,176,286,435,629,874,1176,1541,1975, 2484,3074,3751,4521,5390,6364,7449,8651,9976, 11430,13019,14749,16626,18656,20845,23199,25724, 28426,31311,34385,37654,41124,44801,48691,52800, 57134] |