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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 10 |
| 4 | 16 |
| 5 | 22 |
| 6 | 30 |
| 7 | 39 |
| 8 | 49 |
| 9 | 60 |
| 10 | 72 |
| 11 | 85 |
| 12 | 100 |
| 13 | 115 |
| 14 | 132 |
| 15 | 149 |
| 16 | 168 |
| 17 | 188 |
| 18 | 209 |
| 19 | 231 |
| 20 | 254 |
| 21 | 278 |
| 22 | 303 |
| 23 | 329 |
| 24 | 357 |
| 25 | 385 |
| 26 | 415 |
| 27 | 445 |
| 28 | 477 |
| 29 | 509 |
| 30 | 543 |
| 31 | 577 |
| 32 | 614 |
| 33 | 650 |
| 34 | 689 |
| 35 | 727 |
| 36 | 768 |
| 37 | 808 |
| 38 | 851 |
| 39 | 893 |
| 40 | 938 |
| 41 | 983 |
| 42 | 1030 |
| 43 | 1077 |
| 44 | 1126 |
| 45 | 1175 |
| 46 | 1226 |
| 47 | 1277 |
| 48 | 1330 |
| 49 | 1383 |
| 50 | 1438 |
| 51 | 1494 |
[1,3,6,10,16,22,30,39,49,60,72,85,100,115,132,149, 168,188,209,231,254,278,303,329,357,385,415,445, 477,509,543,577,614,650,689,727,768,808,851,893, 938,983,1030,1077,1126,1175,1226,1277,1330,1383, 1438,1494] |