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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 20 |
| 4 | 56 |
| 5 | 90 |
| 6 | 132 |
| 7 | 182 |
| 8 | 240 |
| 9 | 306 |
| 10 | 399 |
| 11 | 506 |
| 12 | 600 |
| 13 | 702 |
| 14 | 812 |
| 15 | 930 |
| 16 | 1056 |
| 17 | 1190 |
| 18 | 1332 |
| 19 | 1482 |
| 20 | 1640 |
| 21 | 1806 |
| 22 | 1980 |
| 23 | 2162 |
| 24 | 2352 |
| 25 | 2550 |
| 26 | 2756 |
| 27 | 2970 |
| 28 | 3306 |
| 29 | 3540 |
| 30 | 3782 |
| 31 | 4032 |
| 32 | 4290 |
| 33 | 4556 |
| 34 | 4830 |
| 35 | 5112 |
| 36 | 5402 |
| 37 | 5700 |
| 38 | 6006 |
| 39 | 6320 |
| 40 | 6642 |
| 41 | 6972 |
| 42 | 7310 |
| 43 | 7656 |
| 44 | 8099 |
| 45 | 8556 |
| 46 | 8930 |
| 47 | 9312 |
[1,6,20,56,90,132,182,240,306,399,506,600,702,812, 930,1056,1190,1332,1482,1640,1806,1980,2162,2352, 2550,2756,2970,3306,3540,3782,4032,4290,4556,4830, 5112,5402,5700,6006,6320,6642,6972,7310,7656,8099, 8556,8930,9312] |