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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 6 |
| 7 | 9 |
| 8 | 12 |
| 9 | 17 |
| 10 | 21 |
| 11 | 31 |
| 12 | 37 |
| 13 | 54 |
| 14 | 66 |
| 15 | 92 |
| 16 | 114 |
| 17 | 159 |
| 18 | 198 |
| 19 | 268 |
| 20 | 335 |
| 21 | 448 |
| 22 | 563 |
| 23 | 736 |
| 24 | 921 |
| 25 | 1190 |
| 26 | 1485 |
| 27 | 1892 |
| 28 | 2340 |
| 29 | 2953 |
| 30 | 3636 |
| 31 | 4534 |
| 32 | 5542 |
| 33 | 6861 |
| 34 | 8333 |
| 35 | 10226 |
| 36 | 12347 |
| 37 | 15052 |
| 38 | 18079 |
| 39 | 21907 |
| 40 | 26168 |
| 41 | 31537 |
| 42 | 37526 |
| 43 | 44987 |
| 44 | 53307 |
| 45 | 63653 |
| 46 | 75156 |
| 47 | 89369 |
| 48 | 105204 |
[0,0,1,1,3,4,6,9,12,17,21,31,37,54,66,92,114,159, 198,268,335,448,563,736,921,1190,1485,1892,2340, 2953,3636,4534,5542,6861,8333,10226,12347,15052, 18079,21907,26168,31537,37526,44987,53307,63653, 75156,89369,105204] |