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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 14 |
| 7 | 20 |
| 8 | 25 |
| 9 | 32 |
| 10 | 37 |
| 11 | 45 |
| 12 | 51 |
| 13 | 61 |
| 14 | 68 |
| 15 | 79 |
| 16 | 86 |
| 17 | 98 |
| 18 | 106 |
| 19 | 120 |
| 20 | 129 |
| 21 | 144 |
| 22 | 153 |
| 23 | 169 |
| 24 | 179 |
| 25 | 196 |
| 26 | 206 |
| 27 | 223 |
| 28 | 233 |
| 29 | 251 |
| 30 | 262 |
| 31 | 282 |
| 32 | 294 |
| 33 | 315 |
| 34 | 327 |
| 35 | 348 |
| 36 | 360 |
| 37 | 382 |
| 38 | 395 |
| 39 | 418 |
| 40 | 431 |
| 41 | 455 |
| 42 | 469 |
| 43 | 495 |
| 44 | 510 |
| 45 | 537 |
| 46 | 552 |
| 47 | 580 |
| 48 | 596 |
| 49 | 625 |
| 50 | 641 |
| 51 | 670 |
| 52 | 686 |
| 53 | 716 |
| 54 | 733 |
| 55 | 764 |
| 56 | 781 |
[0,1,3,6,10,14,20,25,32,37,45,51,61,68,79,86,98, 106,120,129,144,153,169,179,196,206,223,233,251, 262,282,294,315,327,348,360,382,395,418,431,455, 469,495,510,537,552,580,596,625,641,670,686,716, 733,764,781] |