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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 3 |
| 9 | 3 |
| 10 | 5 |
| 11 | 5 |
| 12 | 8 |
| 13 | 8 |
| 14 | 12 |
| 15 | 13 |
| 16 | 18 |
| 17 | 19 |
| 18 | 24 |
| 19 | 26 |
| 20 | 33 |
| 21 | 35 |
| 22 | 43 |
| 23 | 46 |
| 24 | 55 |
| 25 | 59 |
| 26 | 69 |
| 27 | 74 |
| 28 | 86 |
| 29 | 91 |
| 30 | 104 |
| 31 | 111 |
| 32 | 126 |
| 33 | 134 |
| 34 | 150 |
| 35 | 159 |
| 36 | 177 |
| 37 | 187 |
| 38 | 207 |
| 39 | 219 |
| 40 | 241 |
| 41 | 254 |
| 42 | 277 |
| 43 | 292 |
| 44 | 318 |
| 45 | 334 |
| 46 | 362 |
| 47 | 380 |
| 48 | 410 |
| 49 | 430 |
| 50 | 462 |
| 51 | 484 |
| 52 | 519 |
| 53 | 542 |
| 54 | 579 |
| 55 | 605 |
[0,0,0,1,0,1,1,3,3,5,5,8,8,12,13,18,19,24,26,33, 35,43,46,55,59,69,74,86,91,104,111,126,134,150, 159,177,187,207,219,241,254,277,292,318,334,362, 380,410,430,462,484,519,542,579,605] |