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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 4 |
| 3 | 31 |
| 4 | 80 |
| 5 | 146 |
| 6 | 224 |
| 7 | 315 |
| 8 | 420 |
| 9 | 540 |
| 10 | 676 |
| 11 | 829 |
| 12 | 1000 |
| 13 | 1190 |
| 14 | 1400 |
| 15 | 1631 |
| 16 | 1884 |
| 17 | 2160 |
| 18 | 2460 |
| 19 | 2785 |
| 20 | 3136 |
| 21 | 3514 |
| 22 | 3920 |
| 23 | 4355 |
| 24 | 4820 |
| 25 | 5316 |
| 26 | 5844 |
| 27 | 6405 |
| 28 | 7000 |
| 29 | 7630 |
| 30 | 8296 |
| 31 | 8999 |
| 32 | 9740 |
| 33 | 10520 |
| 34 | 11340 |
| 35 | 12201 |
| 36 | 13104 |
| 37 | 14050 |
| 38 | 15040 |
| 39 | 16075 |
| 40 | 17156 |
| 41 | 18284 |
[0,0,4,31,80,146,224,315,420,540,676,829,1000, 1190,1400,1631,1884,2160,2460,2785,3136,3514,3920, 4355,4820,5316,5844,6405,7000,7630,8296,8999,9740, 10520,11340,12201,13104,14050,15040,16075,17156, 18284] |