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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 4 |
| 7 | 4 |
| 8 | 6 |
| 9 | 11 |
| 10 | 12 |
| 11 | 22 |
| 12 | 30 |
| 13 | 42 |
| 14 | 68 |
| 15 | 91 |
| 16 | 140 |
| 17 | 205 |
| 18 | 292 |
| 19 | 443 |
| 20 | 634 |
| 21 | 936 |
| 22 | 1380 |
| 23 | 1999 |
| 24 | 2960 |
| 25 | 4316 |
| 26 | 6324 |
| 27 | 9300 |
| 28 | 13576 |
| 29 | 19949 |
| 30 | 29216 |
| 31 | 42785 |
| 32 | 62790 |
| 33 | 91917 |
| 34 | 134784 |
| 35 | 197548 |
| 36 | 289402 |
| 37 | 424331 |
| 38 | 621708 |
| 39 | 911218 |
| 40 | 1335586 |
| 41 | 1957086 |
| 42 | 2868620 |
| 43 | 4203927 |
| 44 | 6161084 |
[0,1,0,1,2,1,4,4,6,11,12,22,30,42,68,91,140,205, 292,443,634,936,1380,1999,2960,4316,6324,9300, 13576,19949,29216,42785,62790,91917,134784,197548, 289402,424331,621708,911218,1335586,1957086, 2868620,4203927,6161084] |