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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 1 |
| 14 | 1 |
| 15 | 2 |
| 16 | 3 |
| 17 | 5 |
| 18 | 6 |
| 19 | 11 |
| 20 | 15 |
| 21 | 24 |
| 22 | 33 |
| 23 | 50 |
| 24 | 69 |
| 25 | 104 |
| 26 | 142 |
| 27 | 207 |
| 28 | 287 |
| 29 | 411 |
| 30 | 565 |
| 31 | 801 |
| 32 | 1101 |
| 33 | 1544 |
| 34 | 2118 |
| 35 | 2945 |
| 36 | 4031 |
| 37 | 5575 |
| 38 | 7609 |
| 39 | 10465 |
| 40 | 14264 |
| 41 | 19535 |
| 42 | 26564 |
| 43 | 36266 |
| 44 | 49237 |
| 45 | 67031 |
| 46 | 90879 |
| 47 | 123444 |
| 48 | 167163 |
| 49 | 226702 |
| 50 | 306694 |
[0,0,0,0,0,0,0,0,0,0,0,0,1,1,2,3,5,6,11,15,24,33, 50,69,104,142,207,287,411,565,801,1101,1544,2118, 2945,4031,5575,7609,10465,14264,19535,26564,36266, 49237,67031,90879,123444,167163,226702,306694] |