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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 10 |
| 5 | 15 |
| 6 | 22 |
| 7 | 30 |
| 8 | 39 |
| 9 | 49 |
| 10 | 61 |
| 11 | 74 |
| 12 | 88 |
| 13 | 103 |
| 14 | 119 |
| 15 | 137 |
| 16 | 156 |
| 17 | 176 |
| 18 | 197 |
| 19 | 220 |
| 20 | 244 |
| 21 | 269 |
| 22 | 295 |
| 23 | 322 |
| 24 | 351 |
| 25 | 381 |
| 26 | 412 |
| 27 | 444 |
| 28 | 478 |
| 29 | 513 |
| 30 | 549 |
| 31 | 586 |
| 32 | 625 |
| 33 | 665 |
| 34 | 706 |
| 35 | 748 |
| 36 | 791 |
| 37 | 836 |
| 38 | 882 |
| 39 | 929 |
| 40 | 977 |
| 41 | 1027 |
| 42 | 1078 |
| 43 | 1130 |
| 44 | 1183 |
| 45 | 1237 |
| 46 | 1293 |
| 47 | 1350 |
| 48 | 1408 |
| 49 | 1467 |
| 50 | 1528 |
| 51 | 1590 |
| 52 | 1653 |
| 53 | 1717 |
[1,3,6,10,15,22,30,39,49,61,74,88,103,119,137,156, 176,197,220,244,269,295,322,351,381,412,444,478, 513,549,586,625,665,706,748,791,836,882,929,977, 1027,1078,1130,1183,1237,1293,1350,1408,1467,1528, 1590,1653,1717] |