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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 9 |
| 2 | 4 |
| 3 | 9 |
| 4 | 4 |
| 5 | 9 |
| 6 | 4 |
| 7 | 9 |
| 8 | 4 |
| 9 | 9 |
| 10 | 4 |
| 11 | 9 |
| 12 | 4 |
| 13 | 9 |
| 14 | 4 |
| 15 | 9 |
| 16 | 4 |
| 17 | 9 |
| 18 | 4 |
| 19 | 9 |
| 20 | 4 |
| 21 | 9 |
| 22 | 4 |
| 23 | 9 |
| 24 | 4 |
| 25 | 9 |
| 26 | 4 |
| 27 | 9 |
| 28 | 4 |
| 29 | 9 |
| 30 | 4 |
| 31 | 9 |
| 32 | 4 |
| 33 | 9 |
| 34 | 4 |
| 35 | 9 |
| 36 | 4 |
| 37 | 9 |
| 38 | 4 |
| 39 | 9 |
| 40 | 4 |
| 41 | 9 |
| 42 | 4 |
| 43 | 9 |
| 44 | 4 |
| 45 | 9 |
| 46 | 4 |
| 47 | 9 |
| 48 | 4 |
| 49 | 9 |
| 50 | 4 |
| 51 | 9 |
| 52 | 4 |
| 53 | 9 |
| 54 | 4 |
| 55 | 9 |
| 56 | 4 |
| 57 | 9 |
| 58 | 4 |
| 59 | 9 |
| 60 | 4 |
| 61 | 9 |
| 62 | 4 |
| 63 | 9 |
| 64 | 4 |
| 65 | 9 |
| 66 | 4 |
| 67 | 9 |
| 68 | 4 |
| 69 | 9 |
| 70 | 4 |
| 71 | 9 |
| 72 | 4 |
| 73 | 9 |
| 74 | 4 |
| 75 | 9 |
| 76 | 4 |
| 77 | 9 |
| 78 | 4 |
| 79 | 9 |
| 80 | 4 |
[4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9, 4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4, 9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9, 4,9,4,9,4,9,4] |