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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 9 |
| 3 | 13 |
| 4 | 18 |
| 5 | 21 |
| 6 | 25 |
| 7 | 29 |
| 8 | 34 |
| 9 | 36 |
| 10 | 37 |
| 11 | 46 |
| 12 | 49 |
| 13 | 50 |
| 14 | 45 |
| 15 | 53 |
| 16 | 58 |
| 17 | 54 |
| 18 | 68 |
| 19 | 61 |
| 20 | 66 |
| 21 | 74 |
| 22 | 69 |
| 23 | 70 |
| 24 | 78 |
| 25 | 77 |
| 26 | 81 |
| 27 | 84 |
| 28 | 86 |
[0,4,9,13,18,21,25,29,34,36,37,46,49,50,45,53,58, 54,68,61,66,74,69,70,78,77,81,84,86] |