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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 42 |
| 3 | 184 |
| 4 | 731 |
| 5 | 2736 |
| 6 | 9844 |
| 7 | 34448 |
| 8 | 118101 |
| 9 | 398584 |
| 10 | 1328606 |
| 11 | 4384392 |
| 12 | 14348911 |
| 13 | 46633952 |
| 14 | 150663528 |
| 15 | 484275616 |
| 16 | 1549681961 |
| 17 | 4939611240 |
| 18 | 15690529810 |
| 19 | 49686677720 |
| 20 | 156905298051 |
| 21 | 494251688848 |
| 22 | 1553362450652 |
| 23 | 4871909504304 |
| 24 | 15251194969981 |
| 25 | 47659984281176 |
[1,8,42,184,731,2736,9844,34448,118101,398584, 1328606,4384392,14348911,46633952,150663528, 484275616,1549681961,4939611240,15690529810, 49686677720,156905298051,494251688848, 1553362450652,4871909504304,15251194969981, 47659984281176] |