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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 4 |
| 8 | 11 |
| 9 | 19 |
| 10 | 49 |
| 11 | 103 |
| 12 | 254 |
| 13 | 583 |
| 14 | 1445 |
| 15 | 3506 |
| 16 | 8815 |
| 17 | 22082 |
| 18 | 56286 |
| 19 | 143822 |
| 20 | 371354 |
| 21 | 963250 |
| 22 | 2516822 |
| 23 | 6607348 |
| 24 | 17440933 |
| 25 | 46233833 |
| 26 | 123090070 |
| 27 | 328923702 |
| 28 | 882114742 |
| 29 | 2373351473 |
| 30 | 6405275496 |
| 31 | 17336081498 |
| 32 | 47047112028 |
[0,0,1,0,1,1,3,4,11,19,49,103,254,583,1445,3506, 8815,22082,56286,143822,371354,963250,2516822, 6607348,17440933,46233833,123090070,328923702, 882114742,2373351473,6405275496,17336081498, 47047112028] |