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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 22 |
| 3 | 215 |
| 4 | 2737 |
| 5 | 8636 |
| 6 | 20805 |
| 7 | 38867 |
| 8 | 1868 |
| 9 | 6505 |
| 10 | 5767 |
| 11 | 1004 |
| 12 | 1216 |
| 13 | 11702 |
| 14 | 55995 |
| 15 | 43202 |
| 16 | 314308 |
| 17 | 2100749 |
| 18 | 2420235 |
| 19 | 7750204 |
| 20 | 5141127 |
| 21 | 2950527 |
| 22 | 3113789 |
| 23 | 42198 |
| 24 | 119161 |
| 25 | 96031 |
| 26 | 77643 |
| 27 | 10695 |
| 28 | 105061 |
| 29 | 37099 |
| 30 | 176209 |
| 31 | 3390478 |
| 32 | 4549989 |
| 33 | 9038843 |
[0,4,22,215,2737,8636,20805,38867,1868,6505,5767, 1004,1216,11702,55995,43202,314308,2100749, 2420235,7750204,5141127,2950527,3113789,42198, 119161,96031,77643,10695,105061,37099,176209, 3390478,4549989,9038843] |