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A048239 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 6 |
| 6 | 11 |
| 7 | 19 |
| 8 | 33 |
| 9 | 55 |
| 10 | 95 |
| 11 | 158 |
| 12 | 267 |
| 13 | 442 |
| 14 | 731 |
| 15 | 1193 |
| 16 | 1947 |
| 17 | 3137 |
| 18 | 5039 |
| 19 | 8026 |
[1,1,2,4,6,11,19,33,55,95,158,267,442,731,1193, 1947,3137,5039,8026] |