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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 10 |
| 7 | 20 |
| 8 | 35 |
| 9 | 58 |
| 10 | 100 |
| 11 | 192 |
| 12 | 405 |
| 13 | 880 |
| 14 | 1874 |
| 15 | 3844 |
| 16 | 7631 |
| 17 | 14886 |
| 18 | 29020 |
| 19 | 57192 |
| 20 | 114249 |
| 21 | 230300 |
| 22 | 465226 |
| 23 | 936948 |
| 24 | 1877771 |
| 25 | 3748498 |
| 26 | 7470532 |
| 27 | 14895728 |
| 28 | 29749837 |
| 29 | 59514152 |
| 30 | 119166962 |
| 31 | 238627620 |
| 32 | 477606935 |
| 33 | 955315390 |
| 34 | 1909991772 |
| 35 | 3818208792 |
[0,0,0,0,1,4,10,20,35,58,100,192,405,880,1874, 3844,7631,14886,29020,57192,114249,230300,465226, 936948,1877771,3748498,7470532,14895728,29749837, 59514152,119166962,238627620,477606935,955315390, 1909991772,3818208792] |