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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 0 |
| 4 | 4 |
| 5 | 9 |
| 6 | 15 |
| 7 | 22 |
| 8 | 30 |
| 9 | 39 |
| 10 | 49 |
| 11 | 60 |
| 12 | 72 |
| 13 | 85 |
| 14 | 99 |
| 15 | 114 |
| 16 | 130 |
| 17 | 147 |
| 18 | 165 |
| 19 | 184 |
| 20 | 204 |
| 21 | 225 |
| 22 | 247 |
| 23 | 270 |
| 24 | 294 |
| 25 | 319 |
| 26 | 345 |
| 27 | 372 |
| 28 | 400 |
| 29 | 429 |
| 30 | 459 |
| 31 | 490 |
| 32 | 522 |
| 33 | 555 |
| 34 | 589 |
| 35 | 624 |
| 36 | 660 |
| 37 | 697 |
| 38 | 735 |
| 39 | 774 |
| 40 | 814 |
| 41 | 855 |
| 42 | 897 |
| 43 | 940 |
| 44 | 984 |
| 45 | 1029 |
| 46 | 1075 |
| 47 | 1122 |
| 48 | 1170 |
| 49 | 1219 |
| 50 | 1269 |
| 51 | 1320 |
| 52 | 1372 |
| 53 | 1425 |
| 54 | 1479 |
[1,3,0,4,9,15,22,30,39,49,60,72,85,99,114,130,147, 165,184,204,225,247,270,294,319,345,372,400,429, 459,490,522,555,589,624,660,697,735,774,814,855, 897,940,984,1029,1075,1122,1170,1219,1269,1320, 1372,1425,1479] |