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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 15 |
| 4 | 28 |
| 5 | 45 |
| 6 | 66 |
| 7 | 91 |
| 8 | 120 |
| 9 | 153 |
| 10 | 190 |
| 11 | 231 |
| 12 | 276 |
| 13 | 325 |
| 14 | 378 |
| 15 | 435 |
| 16 | 496 |
| 17 | 561 |
| 18 | 630 |
| 19 | 703 |
| 20 | 780 |
| 21 | 861 |
| 22 | 946 |
| 23 | 1035 |
| 24 | 1128 |
| 25 | 1225 |
| 26 | 1326 |
| 27 | 1431 |
| 28 | 1540 |
| 29 | 1653 |
| 30 | 1770 |
| 31 | 1891 |
| 32 | 2016 |
| 33 | 2145 |
| 34 | 2278 |
| 35 | 2415 |
| 36 | 2556 |
| 37 | 2701 |
| 38 | 2850 |
| 39 | 3003 |
| 40 | 3160 |
| 41 | 3321 |
| 42 | 3486 |
| 43 | 3655 |
| 44 | 3828 |
| 45 | 4005 |
| 46 | 4186 |
| 47 | 4371 |
| 48 | 4560 |
[0,1,6,15,28,45,66,91,120,153,190,231,276,325,378, 435,496,561,630,703,780,861,946,1035,1128,1225, 1326,1431,1540,1653,1770,1891,2016,2145,2278,2415, 2556,2701,2850,3003,3160,3321,3486,3655,3828,4005, 4186,4371,4560] |