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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 6 |
| 11 | 9 |
| 12 | 12 |
| 13 | 16 |
| 14 | 20 |
| 15 | 25 |
| 16 | 31 |
| 17 | 38 |
| 18 | 46 |
| 19 | 54 |
| 20 | 63 |
| 21 | 73 |
| 22 | 83 |
| 23 | 94 |
| 24 | 105 |
| 25 | 116 |
| 26 | 127 |
| 27 | 138 |
| 28 | 150 |
| 29 | 162 |
| 30 | 174 |
| 31 | 187 |
| 32 | 200 |
| 33 | 214 |
| 34 | 229 |
| 35 | 244 |
| 36 | 260 |
| 37 | 277 |
| 38 | 294 |
| 39 | 312 |
| 40 | 331 |
| 41 | 351 |
| 42 | 372 |
| 43 | 393 |
| 44 | 414 |
| 45 | 435 |
| 46 | 457 |
| 47 | 479 |
| 48 | 501 |
| 49 | 523 |
| 50 | 546 |
| 51 | 569 |
| 52 | 593 |
| 53 | 617 |
| 54 | 642 |
| 55 | 667 |
| 56 | 693 |
| 57 | 720 |
| 58 | 747 |
| 59 | 775 |
[0,0,0,0,0,0,1,2,4,6,9,12,16,20,25,31,38,46,54,63, 73,83,94,105,116,127,138,150,162,174,187,200,214, 229,244,260,277,294,312,331,351,372,393,414,435, 457,479,501,523,546,569,593,617,642,667,693,720, 747,775] |