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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 12 |
| 3 | 21 |
| 4 | 39 |
| 5 | 67 |
| 6 | 99 |
| 7 | 129 |
| 8 | 172 |
| 9 | 228 |
| 10 | 275 |
| 11 | 319 |
| 12 | 391 |
| 13 | 480 |
| 14 | 541 |
| 15 | 611 |
| 16 | 709 |
| 17 | 804 |
| 18 | 900 |
| 19 | 988 |
| 20 | 1103 |
| 21 | 1225 |
| 22 | 1345 |
| 23 | 1462 |
| 24 | 1591 |
| 25 | 1742 |
| 26 | 1874 |
| 27 | 2003 |
| 28 | 2174 |
| 29 | 2357 |
| 30 | 2507 |
| 31 | 2636 |
| 32 | 2830 |
| 33 | 3062 |
| 34 | 3221 |
| 35 | 3365 |
| 36 | 3597 |
| 37 | 3835 |
| 38 | 4010 |
| 39 | 4190 |
| 40 | 4453 |
| 41 | 4688 |
| 42 | 4899 |
| 43 | 5143 |
| 44 | 5386 |
| 45 | 5650 |
| 46 | 5874 |
[1,4,12,21,39,67,99,129,172,228,275,319,391,480, 541,611,709,804,900,988,1103,1225,1345,1462,1591, 1742,1874,2003,2174,2357,2507,2636,2830,3062,3221, 3365,3597,3835,4010,4190,4453,4688,4899,5143,5386, 5650,5874] |