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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 7 |
| 12 | 98 |
| 13 | 575 |
| 14 | 2009 |
| 15 | 5468 |
| 16 | 13365 |
| 17 | 30910 |
| 18 | 70156 |
| 19 | 170830 |
| 20 | 531334 |
| 21 | 2203895 |
| 22 | 10091063 |
| 23 | 44034478 |
| 24 | 176213307 |
| 25 | 650957418 |
| 26 | 2258314543 |
| 27 | 7491190627 |
| 28 | 24204620623 |
| 29 | 77794583961 |
| 30 | 254583038843 |
| 31 | 865776314524 |
| 32 | 3087754003802 |
| 33 | 11479621448305 |
[1,0,0,0,0,1,1,1,1,1,1,7,98,575,2009,5468,13365, 30910,70156,170830,531334,2203895,10091063, 44034478,176213307,650957418,2258314543, 7491190627,24204620623,77794583961,254583038843, 865776314524,3087754003802,11479621448305] |