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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 7 |
| 5 | 14 |
| 6 | 24 |
| 7 | 42 |
| 8 | 69 |
| 9 | 113 |
| 10 | 178 |
| 11 | 276 |
| 12 | 420 |
| 13 | 630 |
| 14 | 930 |
| 15 | 1360 |
| 16 | 1963 |
| 17 | 2804 |
| 18 | 3969 |
| 19 | 5568 |
| 20 | 7746 |
| 21 | 10700 |
| 22 | 14672 |
| 23 | 19986 |
| 24 | 27060 |
| 25 | 36423 |
| 26 | 48754 |
| 27 | 64928 |
| 28 | 86038 |
| 29 | 113478 |
| 30 | 149012 |
| 31 | 194842 |
| 32 | 253737 |
| 33 | 329172 |
| 34 | 425452 |
| 35 | 547952 |
| 36 | 703343 |
| 37 | 899858 |
| 38 | 1147680 |
| 39 | 1459364 |
| 40 | 1850310 |
| 41 | 2339432 |
[0,1,1,4,7,14,24,42,69,113,178,276,420,630,930, 1360,1963,2804,3969,5568,7746,10700,14672,19986, 27060,36423,48754,64928,86038,113478,149012, 194842,253737,329172,425452,547952,703343,899858, 1147680,1459364,1850310,2339432] |