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A129383 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 8 |
| 6 | 20 |
| 7 | 32 |
| 8 | 70 |
| 9 | 120 |
| 10 | 252 |
| 11 | 452 |
| 12 | 924 |
| 13 | 1696 |
| 14 | 3432 |
| 15 | 6400 |
| 16 | 12870 |
| 17 | 24240 |
| 18 | 48620 |
| 19 | 92252 |
| 20 | 184756 |
| 21 | 352464 |
| 22 | 705432 |
| 23 | 1351616 |
| 24 | 2704156 |
| 25 | 5199376 |
| 26 | 10400600 |
| 27 | 20056584 |
| 28 | 40116600 |
| 29 | 77555328 |
| 30 | 155117520 |
| 31 | 300533760 |
| 32 | 601080390 |
| 33 | 1166790240 |
[1,0,2,2,6,8,20,32,70,120,252,452,924,1696,3432, 6400,12870,24240,48620,92252,184756,352464,705432, 1351616,2704156,5199376,10400600,20056584, 40116600,77555328,155117520,300533760,601080390, 1166790240] |