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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 15 |
| 3 | 40 |
| 4 | 69 |
| 5 | 122 |
| 6 | 175 |
| 7 | 272 |
| 8 | 373 |
| 9 | 506 |
| 10 | 663 |
| 11 | 888 |
| 12 | 1101 |
| 13 | 1370 |
| 14 | 1639 |
| 15 | 2044 |
| 16 | 2437 |
| 17 | 2866 |
| 18 | 3363 |
| 19 | 3980 |
| 20 | 4549 |
| 21 | 5194 |
| 22 | 5879 |
| 23 | 6752 |
| 24 | 7581 |
| 25 | 8478 |
| 26 | 9419 |
| 27 | 10592 |
| 28 | 11721 |
| 29 | 12914 |
| 30 | 14163 |
| 31 | 15664 |
| 32 | 17125 |
| 33 | 18702 |
| 34 | 20363 |
| 35 | 22144 |
| 36 | 23981 |
| 37 | 26058 |
| 38 | 28075 |
| 39 | 30340 |
| 40 | 32665 |
| 41 | 35026 |
| 42 | 37491 |
[1,6,15,40,69,122,175,272,373,506,663,888,1101, 1370,1639,2044,2437,2866,3363,3980,4549,5194,5879, 6752,7581,8478,9419,10592,11721,12914,14163,15664, 17125,18702,20363,22144,23981,26058,28075,30340, 32665,35026,37491] |