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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 10 |
| 4 | 22 |
| 5 | 46 |
| 6 | 97 |
| 7 | 209 |
| 8 | 452 |
| 9 | 972 |
| 10 | 2084 |
| 11 | 4472 |
| 12 | 9608 |
| 13 | 20645 |
| 14 | 44345 |
| 15 | 95238 |
| 16 | 204552 |
| 17 | 439366 |
| 18 | 943734 |
| 19 | 2027046 |
| 20 | 4353861 |
| 21 | 9351633 |
| 22 | 20086392 |
| 23 | 43143592 |
| 24 | 92668072 |
| 25 | 199041584 |
| 26 | 427521184 |
| 27 | 918272425 |
| 28 | 1972356577 |
| 29 | 4236422746 |
| 30 | 9099408124 |
| 31 | 19544609858 |
| 32 | 41979848918 |
[1,2,4,10,22,46,97,209,452,972,2084,4472,9608, 20645,44345,95238,204552,439366,943734,2027046, 4353861,9351633,20086392,43143592,92668072, 199041584,427521184,918272425,1972356577, 4236422746,9099408124,19544609858,41979848918] |