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| n | a(n) |
|---|---|
| 4 | 13 |
| 5 | 20 |
| 6 | 31 |
| 7 | 48 |
| 8 | 74 |
| 9 | 114 |
| 10 | 175 |
| 11 | 268 |
| 12 | 410 |
| 13 | 626 |
| 14 | 955 |
| 15 | 1456 |
| 16 | 2218 |
| 17 | 3378 |
| 18 | 5143 |
| 19 | 7828 |
| 20 | 11914 |
| 21 | 18130 |
| 22 | 27587 |
| 23 | 41976 |
| 24 | 63866 |
| 25 | 97170 |
| 26 | 147839 |
| 27 | 224924 |
| 28 | 342202 |
| 29 | 520626 |
| 30 | 792075 |
| 31 | 1205056 |
| 32 | 1833354 |
| 33 | 2789234 |
| 34 | 4243495 |
| 35 | 6455972 |
| 36 | 9821994 |
| 37 | 14942994 |
| 38 | 22733971 |
[13,20,31,48,74,114,175,268,410,626,955,1456,2218, 3378,5143,7828,11914,18130,27587,41976,63866, 97170,147839,224924,342202,520626,792075,1205056, 1833354,2789234,4243495,6455972,9821994,14942994, 22733971] |