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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 2 |
| 8 | 3 |
| 9 | 7 |
| 10 | 9 |
| 11 | 18 |
| 12 | 16 |
| 13 | 31 |
| 14 | 42 |
| 15 | 61 |
| 16 | 87 |
| 17 | 133 |
| 18 | 169 |
| 19 | 246 |
| 20 | 302 |
| 21 | 411 |
| 22 | 545 |
| 23 | 738 |
| 24 | 874 |
| 25 | 1167 |
| 26 | 1497 |
| 27 | 1945 |
| 28 | 2421 |
| 29 | 3110 |
| 30 | 3498 |
| 31 | 4476 |
| 32 | 5615 |
| 33 | 7061 |
| 34 | 8777 |
| 35 | 10925 |
| 36 | 12957 |
| 37 | 16036 |
| 38 | 19644 |
| 39 | 24061 |
| 40 | 28858 |
| 41 | 35177 |
| 42 | 41572 |
| 43 | 50424 |
| 44 | 60643 |
| 45 | 72953 |
| 46 | 87499 |
| 47 | 104893 |
| 48 | 123821 |
| 49 | 147776 |
[1,0,0,0,0,1,0,2,3,7,9,18,16,31,42,61,87,133,169, 246,302,411,545,738,874,1167,1497,1945,2421,3110, 3498,4476,5615,7061,8777,10925,12957,16036,19644, 24061,28858,35177,41572,50424,60643,72953,87499, 104893,123821,147776] |