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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 21 |
| 5 | 33 |
| 6 | 48 |
| 7 | 65 |
| 8 | 85 |
| 9 | 108 |
| 10 | 133 |
| 11 | 161 |
| 12 | 192 |
| 13 | 225 |
| 14 | 261 |
| 15 | 300 |
| 16 | 341 |
| 17 | 385 |
| 18 | 432 |
| 19 | 481 |
| 20 | 533 |
| 21 | 588 |
| 22 | 645 |
| 23 | 705 |
| 24 | 768 |
| 25 | 833 |
| 26 | 901 |
| 27 | 972 |
| 28 | 1045 |
| 29 | 1121 |
| 30 | 1200 |
| 31 | 1281 |
| 32 | 1365 |
| 33 | 1452 |
| 34 | 1541 |
| 35 | 1633 |
| 36 | 1728 |
| 37 | 1825 |
| 38 | 1925 |
| 39 | 2028 |
| 40 | 2133 |
| 41 | 2241 |
| 42 | 2352 |
| 43 | 2465 |
| 44 | 2581 |
| 45 | 2700 |
| 46 | 2821 |
| 47 | 2945 |
| 48 | 3072 |
| 49 | 3201 |
| 50 | 3333 |
| 51 | 3468 |
| 52 | 3605 |
| 53 | 3745 |
| 54 | 3888 |
| 55 | 4033 |
| 56 | 4181 |
| 57 | 4332 |
| 58 | 4485 |
| 59 | 4641 |
| 60 | 4800 |
| 61 | 4961 |
| 62 | 5125 |
| 63 | 5292 |
| 64 | 5461 |
| 65 | 5633 |
| 66 | 5808 |
| 67 | 5985 |
| 68 | 6165 |
| 69 | 6348 |
| 70 | 6533 |
| 71 | 6721 |
| 72 | 6912 |
| 73 | 7105 |
| 74 | 7301 |
| 75 | 7500 |
| 76 | 7701 |
| 77 | 7905 |
| 78 | 8112 |
| 79 | 8321 |
| 80 | 8533 |
[2,6,12,21,33,48,65,85,108,133,161,192,225,261, 300,341,385,432,481,533,588,645,705,768,833,901, 972,1045,1121,1200,1281,1365,1452,1541,1633,1728, 1825,1925,2028,2133,2241,2352,2465,2581,2700,2821, 2945,3072,3201,3333,3468,3605,3745,3888,4033,4181, 4332,4485,4641,4800,4961,5125,5292,5461,5633,5808, 5985,6165,6348,6533,6721,6912,7105,7301,7500,7701, 7905,8112,8321,8533] |