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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | -2 |
| 5 | 7 |
| 6 | 13 |
| 7 | 20 |
| 8 | -12 |
| 9 | 21 |
| 10 | 31 |
| 11 | 42 |
| 12 | -30 |
| 13 | 43 |
| 14 | 57 |
| 15 | 72 |
| 16 | -56 |
| 17 | 73 |
| 18 | 91 |
| 19 | 110 |
| 20 | -90 |
| 21 | 111 |
| 22 | 133 |
| 23 | 156 |
| 24 | -132 |
| 25 | 157 |
| 26 | 183 |
| 27 | 210 |
| 28 | -182 |
| 29 | 211 |
| 30 | 241 |
| 31 | 272 |
| 32 | -240 |
| 33 | 273 |
| 34 | 307 |
| 35 | 342 |
| 36 | -306 |
| 37 | 343 |
| 38 | 381 |
| 39 | 420 |
| 40 | -380 |
| 41 | 421 |
| 42 | 463 |
| 43 | 506 |
| 44 | -462 |
| 45 | 507 |
| 46 | 553 |
| 47 | 600 |
| 48 | -552 |
| 49 | 601 |
| 50 | 651 |
| 51 | 702 |
| 52 | -650 |
| 53 | 703 |
| 54 | 757 |
[0,1,3,6,-2,7,13,20,-12,21,31,42,-30,43,57,72,-56, 73,91,110,-90,111,133,156,-132,157,183,210,-182, 211,241,272,-240,273,307,342,-306,343,381,420, -380,421,463,506,-462,507,553,600,-552,601,651, 702,-650,703,757] |