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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 1 |
| 11 | 4 |
| 12 | 19 |
| 13 | 23 |
| 14 | 16 |
| 15 | 43 |
| 16 | 59 |
| 17 | 66 |
| 18 | 127 |
| 19 | 492 |
| 20 | 886 |
| 21 | 964 |
| 22 | 2595 |
| 23 | 11426 |
| 24 | 36780 |
| 25 | 78070 |
| 26 | 131232 |
| 27 | 423402 |
| 28 | 1302893 |
| 29 | 3356226 |
| 30 | 6673924 |
| 31 | 16604441 |
| 32 | 32195439 |
| 33 | 69328860 |
[1,1,1,0,0,0,0,0,0,1,1,4,19,23,16,43,59,66,127, 492,886,964,2595,11426,36780,78070,131232,423402, 1302893,3356226,6673924,16604441,32195439, 69328860] |