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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 18 |
| 3 | 17 |
| 4 | 70 |
| 5 | 151 |
| 6 | 557 |
| 7 | 2351 |
| 8 | 6926 |
| 9 | 16083 |
| 10 | 43523 |
| 11 | 126887 |
| 12 | 366749 |
| 13 | 1196290 |
| 14 | 3904083 |
| 15 | 12242778 |
| 16 | 35866180 |
| 17 | 101052064 |
| 18 | 296050389 |
| 19 | 899499517 |
| 20 | 2807496039 |
| 21 | 8933240984 |
| 22 | 27433666911 |
| 23 | 81672960692 |
| 24 | 242780272113 |
| 25 | 727008678986 |
| 26 | 2224880992862 |
[8,18,17,70,151,557,2351,6926,16083,43523,126887, 366749,1196290,3904083,12242778,35866180, 101052064,296050389,899499517,2807496039, 8933240984,27433666911,81672960692,242780272113, 727008678986,2224880992862] |