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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 2 |
| 5 | 3 |
| 6 | 4 |
| 7 | 22 |
| 8 | 26 |
| 9 | 41 |
| 10 | 157 |
| 11 | 269 |
| 12 | 602 |
| 13 | 1505 |
| 14 | 3338 |
| 15 | 7358 |
| 16 | 17635 |
| 17 | 41165 |
| 18 | 96574 |
| 19 | 235239 |
| 20 | 573889 |
| 21 | 1430146 |
| 22 | 3649304 |
| 23 | 9383402 |
| 24 | 24513758 |
| 25 | 64699201 |
| 26 | 171618422 |
| 27 | 457478062 |
| 28 | 1221348009 |
| 29 | 3260383689 |
| 30 | 8698815741 |
| 31 | 23172434460 |
[0,2,3,4,22,26,41,157,269,602,1505,3338,7358, 17635,41165,96574,235239,573889,1430146,3649304, 9383402,24513758,64699201,171618422,457478062, 1221348009,3260383689,8698815741,23172434460] |