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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 20 |
| 5 | 35 |
| 6 | 55 |
| 7 | 83 |
| 8 | 119 |
| 9 | 164 |
| 10 | 218 |
| 11 | 280 |
| 12 | 343 |
| 13 | 431 |
| 14 | 535 |
| 15 | 648 |
| 16 | 760 |
| 17 | 903 |
| 18 | 1064 |
| 19 | 1241 |
| 20 | 1442 |
| 21 | 1659 |
| 22 | 1891 |
| 23 | 2151 |
| 24 | 2409 |
| 25 | 2714 |
| 26 | 3044 |
| 27 | 3369 |
| 28 | 3754 |
| 29 | 4160 |
| 30 | 4582 |
| 31 | 5044 |
| 32 | 5499 |
| 33 | 6015 |
| 34 | 6500 |
| 35 | 7094 |
| 36 | 7669 |
| 37 | 8308 |
| 38 | 8990 |
| 39 | 9683 |
| 40 | 10394 |
| 41 | 11180 |
| 42 | 12010 |
| 43 | 12876 |
| 44 | 13773 |
| 45 | 14720 |
| 46 | 15693 |
| 47 | 16721 |
| 48 | 17705 |
| 49 | 18845 |
| 50 | 20010 |
[1,4,10,20,35,55,83,119,164,218,280,343,431,535, 648,760,903,1064,1241,1442,1659,1891,2151,2409, 2714,3044,3369,3754,4160,4582,5044,5499,6015,6500, 7094,7669,8308,8990,9683,10394,11180,12010,12876, 13773,14720,15693,16721,17705,18845,20010] |