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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 0 |
| 12 | 11 |
| 13 | 11 |
| 14 | 77 |
| 15 | 143 |
| 16 | 495 |
| 17 | 1133 |
| 18 | 3058 |
| 19 | 7271 |
| 20 | 17777 |
| 21 | 41591 |
| 22 | 96767 |
| 23 | 220473 |
| 24 | 496661 |
| 25 | 1103619 |
| 26 | 2425929 |
| 27 | 5276623 |
| 28 | 11370986 |
| 29 | 24294028 |
| 30 | 51316156 |
| 31 | 108047687 |
| 32 | 225688551 |
| 33 | 466237332 |
| 34 | 960231624 |
| 35 | 1967794950 |
| 36 | 3997987950 |
| 37 | 8077762209 |
| 38 | 16258984885 |
| 39 | 32550495175 |
| 40 | 64759902032 |
[1,0,11,11,77,143,495,1133,3058,7271,17777,41591, 96767,220473,496661,1103619,2425929,5276623, 11370986,24294028,51316156,108047687,225688551, 466237332,960231624,1967794950,3997987950, 8077762209,16258984885,32550495175,64759902032] |