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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
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| 90 | 1 |
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| 100 | 1 |
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| 108 | 3 |
| 109 | 2 |
[0,1,2,3,4,5,4,3,2,1,1,2,3,4,5,6,5,4,3,2,2,3,4,5, 6,7,6,5,4,3,3,4,5,6,7,8,7,6,5,4,4,5,6,7,8,9,8,7,6, 5,5,6,7,8,9,10,9,8,7,6,4,5,6,7,8,9,8,7,6,5,3,4,5, 6,7,8,7,6,5,4,2,3,4,5,6,7,6,5,4,3,1,2,3,4,5,6,5,4, 3,2,1,2,3,4,5,6,5,4,3,2] |