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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 120 |
| 3 | 579 |
| 4 | 1600 |
| 5 | 3405 |
| 6 | 6216 |
| 7 | 10255 |
| 8 | 15744 |
| 9 | 22905 |
| 10 | 31960 |
| 11 | 43131 |
| 12 | 56640 |
| 13 | 72709 |
| 14 | 91560 |
| 15 | 113415 |
| 16 | 138496 |
| 17 | 167025 |
| 18 | 199224 |
| 19 | 235315 |
| 20 | 275520 |
| 21 | 320061 |
| 22 | 369160 |
| 23 | 423039 |
| 24 | 481920 |
| 25 | 546025 |
| 26 | 615576 |
| 27 | 690795 |
| 28 | 771904 |
| 29 | 859125 |
| 30 | 952680 |
| 31 | 1052791 |
| 32 | 1159680 |
[1,120,579,1600,3405,6216,10255,15744,22905,31960, 43131,56640,72709,91560,113415,138496,167025, 199224,235315,275520,320061,369160,423039,481920, 546025,615576,690795,771904,859125,952680,1052791, 1159680] |