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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 21 |
| 2 | 83 |
| 3 | 186 |
| 4 | 330 |
| 5 | 516 |
| 6 | 743 |
| 7 | 1012 |
| 8 | 1321 |
| 9 | 1672 |
| 10 | 2065 |
| 11 | 2498 |
| 12 | 2973 |
| 13 | 3489 |
| 14 | 4047 |
| 15 | 4645 |
| 16 | 5285 |
| 17 | 5967 |
| 18 | 6689 |
| 19 | 7453 |
| 20 | 8258 |
| 21 | 9105 |
| 22 | 9993 |
| 23 | 10922 |
| 24 | 11892 |
| 25 | 12904 |
| 26 | 13957 |
| 27 | 15051 |
| 28 | 16186 |
| 29 | 17363 |
| 30 | 18581 |
| 31 | 19841 |
| 32 | 21141 |
| 33 | 22483 |
| 34 | 23866 |
| 35 | 25291 |
| 36 | 26757 |
| 37 | 28264 |
| 38 | 29812 |
[0,21,83,186,330,516,743,1012,1321,1672,2065,2498, 2973,3489,4047,4645,5285,5967,6689,7453,8258,9105, 9993,10922,11892,12904,13957,15051,16186,17363, 18581,19841,21141,22483,23866,25291,26757,28264, 29812] |