| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 21 |
| 4 | 61 |
| 5 | 158 |
| 6 | 386 |
| 7 | 902 |
| 8 | 2051 |
| 9 | 4565 |
| 10 | 10006 |
| 11 | 21668 |
| 12 | 46484 |
| 13 | 98958 |
| 14 | 209360 |
| 15 | 440627 |
| 16 | 923299 |
| 17 | 1927456 |
| 18 | 4010730 |
| 19 | 8322242 |
| 20 | 17226050 |
| 21 | 35578192 |
| 22 | 73339778 |
| 23 | 150918130 |
| 24 | 310073773 |
| 25 | 636173403 |
| 26 | 1303554560 |
| 27 | 2667935114 |
| 28 | 5454522188 |
| 29 | 11140674850 |
| 30 | 22733861902 |
| 31 | 46352349432 |
| 32 | 94435176992 |
[1,6,21,61,158,386,902,2051,4565,10006,21668, 46484,98958,209360,440627,923299,1927456,4010730, 8322242,17226050,35578192,73339778,150918130, 310073773,636173403,1303554560,2667935114, 5454522188,11140674850,22733861902,46352349432, 94435176992] |