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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 5 |
| 10 | 7 |
| 11 | 9 |
| 12 | 14 |
| 13 | 19 |
| 14 | 29 |
| 15 | 40 |
| 16 | 58 |
| 17 | 79 |
| 18 | 113 |
| 19 | 153 |
| 20 | 215 |
| 21 | 294 |
| 22 | 407 |
| 23 | 555 |
| 24 | 767 |
| 25 | 1040 |
| 26 | 1424 |
| 27 | 1930 |
| 28 | 2624 |
| 29 | 3540 |
| 30 | 4794 |
| 31 | 6441 |
| 32 | 8677 |
| 33 | 11627 |
| 34 | 15589 |
| 35 | 20818 |
| 36 | 27812 |
| 37 | 37011 |
| 38 | 49257 |
| 39 | 65360 |
| 40 | 86681 |
| 41 | 114665 |
| 42 | 151594 |
| 43 | 199947 |
| 44 | 263530 |
| 45 | 346647 |
| 46 | 455553 |
| 47 | 597628 |
[1,0,0,0,0,1,2,3,4,5,7,9,14,19,29,40,58,79,113, 153,215,294,407,555,767,1040,1424,1930,2624,3540, 4794,6441,8677,11627,15589,20818,27812,37011, 49257,65360,86681,114665,151594,199947,263530, 346647,455553,597628] |