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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 6 |
| 5 | 24 |
| 6 | 77 |
| 7 | 216 |
| 8 | 552 |
| 9 | 1315 |
| 10 | 2964 |
| 11 | 6387 |
| 12 | 13255 |
| 13 | 26640 |
| 14 | 52074 |
| 15 | 99336 |
| 16 | 185430 |
| 17 | 339483 |
| 18 | 610709 |
| 19 | 1081227 |
| 20 | 1886484 |
| 21 | 3247502 |
| 22 | 5521365 |
| 23 | 9279624 |
| 24 | 15429149 |
| 25 | 25397088 |
| 26 | 41412030 |
| 27 | 66928700 |
| 28 | 107265576 |
| 29 | 170556654 |
| 30 | 269164346 |
| 31 | 421765920 |
| 32 | 656419080 |
| 33 | 1015044526 |
| 34 | 1559950185 |
| 35 | 2383284894 |
[1,6,24,77,216,552,1315,2964,6387,13255,26640, 52074,99336,185430,339483,610709,1081227,1886484, 3247502,5521365,9279624,15429149,25397088, 41412030,66928700,107265576,170556654,269164346, 421765920,656419080,1015044526,1559950185, 2383284894] |