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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 2 |
| 8 | 3 |
| 9 | 1 |
| 10 | 4 |
| 11 | 5 |
| 12 | 9 |
| 13 | 5 |
| 14 | 14 |
| 15 | 14 |
| 16 | 28 |
| 17 | 19 |
| 18 | 47 |
| 19 | 42 |
| 20 | 89 |
| 21 | 66 |
| 22 | 155 |
| 23 | 131 |
| 24 | 286 |
| 25 | 221 |
| 26 | 507 |
| 27 | 417 |
| 28 | 924 |
| 29 | 728 |
| 30 | 1652 |
| 31 | 1341 |
| 32 | 2993 |
| 33 | 2380 |
| 34 | 5373 |
| 35 | 4334 |
| 36 | 9707 |
| 37 | 7753 |
| 38 | 17460 |
| 39 | 14041 |
| 40 | 31501 |
| 41 | 25213 |
| 42 | 56714 |
| 43 | 45542 |
| 44 | 102256 |
| 45 | 81927 |
| 46 | 184183 |
| 47 | 147798 |
| 48 | 331981 |
| 49 | 266110 |
| 50 | 598091 |
| 51 | 479779 |
| 52 | 1077870 |
| 53 | 864201 |
| 54 | 1942071 |
| 55 | 1557649 |
[0,0,0,1,1,0,1,2,3,1,4,5,9,5,14,14,28,19,47,42,89, 66,155,131,286,221,507,417,924,728,1652,1341,2993, 2380,5373,4334,9707,7753,17460,14041,31501,25213, 56714,45542,102256,81927,184183,147798,331981, 266110,598091,479779,1077870,864201,1942071, 1557649] |