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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 10 |
| 5 | 15 |
| 6 | 21 |
| 7 | 29 |
| 8 | 38 |
| 9 | 48 |
| 10 | 59 |
| 11 | 71 |
| 12 | 85 |
| 13 | 100 |
| 14 | 116 |
| 15 | 133 |
| 16 | 151 |
| 17 | 170 |
| 18 | 191 |
| 19 | 213 |
| 20 | 236 |
| 21 | 260 |
| 22 | 285 |
| 23 | 312 |
| 24 | 340 |
| 25 | 369 |
| 26 | 399 |
| 27 | 430 |
| 28 | 462 |
| 29 | 496 |
| 30 | 531 |
| 31 | 567 |
| 32 | 604 |
| 33 | 642 |
| 34 | 682 |
| 35 | 723 |
| 36 | 765 |
| 37 | 808 |
| 38 | 852 |
| 39 | 897 |
| 40 | 944 |
| 41 | 992 |
| 42 | 1041 |
| 43 | 1091 |
| 44 | 1142 |
| 45 | 1195 |
| 46 | 1249 |
| 47 | 1304 |
| 48 | 1360 |
| 49 | 1417 |
| 50 | 1475 |
| 51 | 1535 |
| 52 | 1596 |
| 53 | 1658 |
[1,3,6,10,15,21,29,38,48,59,71,85,100,116,133,151, 170,191,213,236,260,285,312,340,369,399,430,462, 496,531,567,604,642,682,723,765,808,852,897,944, 992,1041,1091,1142,1195,1249,1304,1360,1417,1475, 1535,1596,1658] |