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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 28 |
| 3 | 82 |
| 4 | 354 |
| 5 | 1718 |
| 6 | 7523 |
| 7 | 33798 |
| 8 | 153703 |
| 9 | 700615 |
| 10 | 3182971 |
| 11 | 14501028 |
| 12 | 66218594 |
| 13 | 302024137 |
| 14 | 1378726299 |
| 15 | 6297606271 |
| 16 | 28758102887 |
| 17 | 131363006085 |
| 18 | 600132606903 |
| 19 | 2741576694529 |
| 20 | 12525540090248 |
| 21 | 57227838857461 |
| 22 | 261466316314962 |
[8,28,82,354,1718,7523,33798,153703,700615, 3182971,14501028,66218594,302024137,1378726299, 6297606271,28758102887,131363006085,600132606903, 2741576694529,12525540090248,57227838857461, 261466316314962] |