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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 11 |
| 5 | 55 |
| 6 | 190 |
| 7 | 526 |
| 8 | 1254 |
| 9 | 2682 |
| 10 | 5280 |
| 11 | 9735 |
| 12 | 17017 |
| 13 | 28457 |
| 14 | 45838 |
| 15 | 71500 |
| 16 | 108460 |
| 17 | 160548 |
| 18 | 232560 |
| 19 | 330429 |
| 20 | 461415 |
| 21 | 634315 |
| 22 | 859694 |
| 23 | 1150138 |
| 24 | 1520530 |
| 25 | 1988350 |
| 26 | 2574000 |
| 27 | 3301155 |
| 28 | 4197141 |
| 29 | 5293341 |
| 30 | 6625630 |
| 31 | 8234840 |
| 32 | 10167256 |
| 33 | 12475144 |
| 34 | 15217312 |
| 35 | 18459705 |
[0,0,1,11,55,190,526,1254,2682,5280,9735,17017, 28457,45838,71500,108460,160548,232560,330429, 461415,634315,859694,1150138,1520530,1988350, 2574000,3301155,4197141,5293341,6625630,8234840, 10167256,12475144,15217312,18459705] |