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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 1 |
| 22 | 8 |
| 23 | 12 |
| 24 | 27 |
| 25 | 162 |
| 26 | 457 |
| 27 | 1198 |
| 28 | 3144 |
| 29 | 8313 |
| 30 | 21507 |
| 31 | 57329 |
| 32 | 152102 |
| 33 | 400610 |
| 34 | 1053254 |
| 35 | 2750411 |
| 36 | 7140575 |
| 37 | 18326660 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,8,12, 27,162,457,1198,3144,8313,21507,57329,152102, 400610,1053254,2750411,7140575,18326660] |