| n | a(n) |
|---|---|
| 0 | 20 |
| 1 | 20 |
| 2 | 40 |
| 3 | 20 |
| 4 | 40 |
| 5 | 20 |
| 6 | 40 |
| 7 | 20 |
| 8 | 40 |
| 9 | 20 |
| 10 | 40 |
| 11 | 20 |
| 12 | 40 |
| 13 | 20 |
| 14 | 40 |
| 15 | 20 |
| 16 | 40 |
| 17 | 20 |
| 18 | 40 |
| 19 | 20 |
| 20 | 40 |
| 21 | 20 |
| 22 | 40 |
| 23 | 20 |
| 24 | 40 |
| 25 | 20 |
| 26 | 40 |
| 27 | 20 |
| 28 | 40 |
| 29 | 20 |
| 30 | 40 |
| 31 | 20 |
| 32 | 40 |
| 33 | 20 |
| 34 | 40 |
| 35 | 20 |
| 36 | 40 |
| 37 | 20 |
| 38 | 40 |
| 39 | 20 |
| 40 | 40 |
| 41 | 20 |
| 42 | 40 |
| 43 | 20 |
| 44 | 40 |
| 45 | 20 |
| 46 | 40 |
| 47 | 20 |
| 48 | 40 |
| 49 | 20 |
| 50 | 40 |
| 51 | 20 |
| 52 | 40 |
| 53 | 20 |
| 54 | 40 |
| 55 | 20 |
| 56 | 40 |
| 57 | 20 |
| 58 | 40 |
| 59 | 20 |
| 60 | 40 |
| 61 | 20 |
| 62 | 40 |
[20,20,40,20,40,20,40,20,40,20,40,20,40,20,40,20, 40,20,40,20,40,20,40,20,40,20,40,20,40,20,40,20, 40,20,40,20,40,20,40,20,40,20,40,20,40,20,40,20, 40,20,40,20,40,20,40,20,40,20,40,20,40,20,40] |