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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 9 |
| 9 | 12 |
| 10 | 17 |
| 11 | 23 |
| 12 | 33 |
| 13 | 43 |
| 14 | 59 |
| 15 | 76 |
| 16 | 102 |
| 17 | 132 |
| 18 | 173 |
| 19 | 221 |
| 20 | 285 |
| 21 | 361 |
| 22 | 462 |
| 23 | 580 |
| 24 | 733 |
| 25 | 913 |
| 26 | 1144 |
| 27 | 1418 |
| 28 | 1761 |
| 29 | 2168 |
| 30 | 2673 |
| 31 | 3273 |
| 32 | 4012 |
| 33 | 4885 |
| 34 | 5952 |
| 35 | 7212 |
| 36 | 8741 |
| 37 | 10546 |
| 38 | 12719 |
| 39 | 15279 |
| 40 | 18344 |
| 41 | 21949 |
| 42 | 26247 |
| 43 | 31287 |
| 44 | 37268 |
| 45 | 44267 |
| 46 | 52541 |
| 47 | 62207 |
| 48 | 73584 |
[0,0,1,1,2,2,4,6,9,12,17,23,33,43,59,76,102,132, 173,221,285,361,462,580,733,913,1144,1418,1761, 2168,2673,3273,4012,4885,5952,7212,8741,10546, 12719,15279,18344,21949,26247,31287,37268,44267, 52541,62207,73584] |