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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 35 |
| 4 | 157 |
| 5 | 695 |
| 6 | 3157 |
| 7 | 14243 |
| 8 | 64170 |
| 9 | 289200 |
| 10 | 1303737 |
| 11 | 5877136 |
| 12 | 26492718 |
| 13 | 119422824 |
| 14 | 538332038 |
| 15 | 2426684411 |
| 16 | 10938961995 |
| 17 | 49310440348 |
| 18 | 222280660511 |
| 19 | 1001992532274 |
| 20 | 4516762839271 |
| 21 | 20360577375094 |
| 22 | 91781022401525 |
[1,8,35,157,695,3157,14243,64170,289200,1303737, 5877136,26492718,119422824,538332038,2426684411, 10938961995,49310440348,222280660511, 1001992532274,4516762839271,20360577375094, 91781022401525] |