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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 1 |
| 24 | 2 |
| 25 | 6 |
| 26 | 13 |
| 27 | 28 |
| 28 | 51 |
| 29 | 99 |
| 30 | 176 |
| 31 | 319 |
| 32 | 548 |
| 33 | 951 |
| 34 | 1594 |
| 35 | 2685 |
| 36 | 4419 |
| 37 | 7282 |
| 38 | 11826 |
| 39 | 19194 |
| 40 | 30831 |
| 41 | 49498 |
| 42 | 78920 |
| 43 | 125770 |
| 44 | 199592 |
| 45 | 316823 |
| 46 | 501973 |
| 47 | 796597 |
| 48 | 1265056 |
| 49 | 2016658 |
| 50 | 3228408 |
| 51 | 5207004 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2, 6,13,28,51,99,176,319,548,951,1594,2685,4419,7282, 11826,19194,30831,49498,78920,125770,199592, 316823,501973,796597,1265056,2016658,3228408, 5207004] |