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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 12 |
| 3 | 80 |
| 4 | 383 |
| 5 | 1406 |
| 6 | 4242 |
| 7 | 11012 |
| 8 | 25405 |
| 9 | 53338 |
| 10 | 103736 |
| 11 | 189432 |
| 12 | 328187 |
| 13 | 543830 |
| 14 | 867518 |
| 15 | 1339116 |
| 16 | 2008697 |
| 17 | 2938162 |
| 18 | 4202980 |
| 19 | 5894048 |
| 20 | 8119671 |
| 21 | 11007662 |
| 22 | 14707562 |
| 23 | 19392980 |
| 24 | 25264053 |
| 25 | 32550026 |
| 26 | 41511952 |
| 27 | 52445512 |
| 28 | 65683955 |
| 29 | 81601158 |
| 30 | 100614806 |
| 31 | 123189692 |
| 32 | 149841137 |
[1,2,12,80,383,1406,4242,11012,25405,53338,103736, 189432,328187,543830,867518,1339116,2008697, 2938162,4202980,5894048,8119671,11007662,14707562, 19392980,25264053,32550026,41511952,52445512, 65683955,81601158,100614806,123189692,149841137] |