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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 4 |
| 8 | 2 |
| 9 | 7 |
| 10 | 12 |
| 11 | 11 |
| 12 | 22 |
| 13 | 26 |
| 14 | 55 |
| 15 | 63 |
| 16 | 99 |
| 17 | 149 |
| 18 | 215 |
| 19 | 324 |
| 20 | 458 |
| 21 | 699 |
| 22 | 1006 |
| 23 | 1492 |
| 24 | 2185 |
| 25 | 3202 |
| 26 | 4734 |
| 27 | 6928 |
| 28 | 10242 |
| 29 | 14951 |
| 30 | 22023 |
| 31 | 32365 |
| 32 | 47557 |
| 33 | 69905 |
| 34 | 102633 |
| 35 | 150983 |
| 36 | 221712 |
| 37 | 325918 |
| 38 | 478841 |
| 39 | 703647 |
| 40 | 1034103 |
| 41 | 1519431 |
| 42 | 2233061 |
| 43 | 3281003 |
| 44 | 4821790 |
| 45 | 7085358 |
[1,0,0,0,0,2,0,4,2,7,12,11,22,26,55,63,99,149,215, 324,458,699,1006,1492,2185,3202,4734,6928,10242, 14951,22023,32365,47557,69905,102633,150983, 221712,325918,478841,703647,1034103,1519431, 2233061,3281003,4821790,7085358] |