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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 0 |
| 1 | 22 |
| 2 | 56 |
| 3 | 177 |
| 4 | 352 |
| 5 | 870 |
| 6 | 1584 |
| 7 | 3412 |
| 8 | 5952 |
| 9 | 11442 |
| 10 | 19240 |
| 11 | 34377 |
| 12 | 56256 |
| 13 | 95560 |
| 14 | 151824 |
| 15 | 247965 |
| 16 | 385024 |
| 17 | 609756 |
| 18 | 927864 |
| 19 | 1431094 |
| 20 | 2139680 |
| 21 | 3228516 |
| 22 | 4752896 |
| 23 | 7038610 |
| 24 | 10215552 |
| 25 | 14885450 |
| 26 | 21330480 |
| 27 | 30643161 |
| 28 | 43407680 |
| 29 | 61571148 |
| 30 | 86305680 |
| 31 | 121034807 |
| 32 | 168032768 |
[1,0,22,56,177,352,870,1584,3412,5952,11442,19240, 34377,56256,95560,151824,247965,385024,609756, 927864,1431094,2139680,3228516,4752896,7038610, 10215552,14885450,21330480,30643161,43407680, 61571148,86305680,121034807,168032768] |