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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 6 |
| 4 | 11 |
| 5 | 17 |
| 6 | 25 |
| 7 | 35 |
| 8 | 46 |
| 9 | 58 |
| 10 | 72 |
| 11 | 88 |
| 12 | 105 |
| 13 | 123 |
| 14 | 143 |
| 15 | 165 |
| 16 | 188 |
| 17 | 212 |
| 18 | 238 |
| 19 | 266 |
| 20 | 295 |
| 21 | 325 |
| 22 | 357 |
| 23 | 391 |
| 24 | 426 |
| 25 | 462 |
| 26 | 500 |
| 27 | 540 |
| 28 | 581 |
| 29 | 623 |
| 30 | 667 |
| 31 | 713 |
| 32 | 760 |
| 33 | 808 |
| 34 | 858 |
| 35 | 910 |
| 36 | 963 |
| 37 | 1017 |
| 38 | 1073 |
| 39 | 1131 |
| 40 | 1190 |
| 41 | 1250 |
| 42 | 1312 |
| 43 | 1376 |
| 44 | 1441 |
| 45 | 1507 |
| 46 | 1575 |
| 47 | 1645 |
| 48 | 1716 |
| 49 | 1788 |
| 50 | 1862 |
| 51 | 1938 |
[0,0,2,6,11,17,25,35,46,58,72,88,105,123,143,165, 188,212,238,266,295,325,357,391,426,462,500,540, 581,623,667,713,760,808,858,910,963,1017,1073, 1131,1190,1250,1312,1376,1441,1507,1575,1645,1716, 1788,1862,1938] |