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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 41 |
| 4 | 208 |
| 5 | 1041 |
| 6 | 5208 |
| 7 | 26041 |
| 8 | 130208 |
| 9 | 651041 |
| 10 | 3255208 |
| 11 | 16276041 |
| 12 | 81380208 |
| 13 | 406901041 |
| 14 | 2034505208 |
| 15 | 10172526041 |
| 16 | 50862630208 |
| 17 | 254313151041 |
| 18 | 1271565755208 |
| 19 | 6357828776041 |
| 20 | 31789143880208 |
| 21 | 158945719401041 |
| 22 | 794728597005208 |
[1,8,41,208,1041,5208,26041,130208,651041,3255208, 16276041,81380208,406901041,2034505208, 10172526041,50862630208,254313151041, 1271565755208,6357828776041,31789143880208, 158945719401041,794728597005208] |