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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 0 |
| 6 | 5 |
| 7 | 1 |
| 8 | 14 |
| 9 | 7 |
| 10 | 43 |
| 11 | 36 |
| 12 | 143 |
| 13 | 166 |
| 14 | 509 |
| 15 | 731 |
| 16 | 1915 |
| 17 | 3158 |
| 18 | 7523 |
| 19 | 13560 |
| 20 | 30537 |
| 21 | 58257 |
| 22 | 127029 |
| 23 | 251266 |
| 24 | 538253 |
| 25 | 1089666 |
| 26 | 2313121 |
| 27 | 4754148 |
| 28 | 10051130 |
| 29 | 20868070 |
| 30 | 44065633 |
| 31 | 92132176 |
| 32 | 194617333 |
| 33 | 408971295 |
| 34 | 864899013 |
| 35 | 1824485600 |
| 36 | 3864369141 |
[1,0,1,0,2,0,5,1,14,7,43,36,143,166,509,731,1915, 3158,7523,13560,30537,58257,127029,251266,538253, 1089666,2313121,4754148,10051130,20868070, 44065633,92132176,194617333,408971295,864899013, 1824485600,3864369141] |