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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 17 |
| 6 | 29 |
| 7 | 75 |
| 8 | 254 |
| 9 | 583 |
| 10 | 1420 |
| 11 | 4843 |
| 12 | 6263 |
| 13 | 17369 |
| 14 | 41001 |
| 15 | 222374 |
| 16 | 485749 |
| 17 | 1679621 |
| 18 | 2165370 |
| 19 | 6010361 |
| 20 | 14186092 |
| 21 | 76940821 |
| 22 | 91126913 |
| 23 | 168067734 |
| 24 | 259194647 |
| 25 | 945651675 |
| 26 | 5933104697 |
| 27 | 12811861069 |
| 28 | 57180548973 |
| 29 | 184353507988 |
| 30 | 425887564949 |
| 31 | 610241072937 |
[1,2,5,12,17,29,75,254,583,1420,4843,6263,17369, 41001,222374,485749,1679621,2165370,6010361, 14186092,76940821,91126913,168067734,259194647, 945651675,5933104697,12811861069,57180548973, 184353507988,425887564949,610241072937] |