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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 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 1 |
| 27 | 5 |
| 28 | 9 |
| 29 | 26 |
| 30 | 51 |
| 31 | 112 |
| 32 | 214 |
| 33 | 425 |
| 34 | 778 |
| 35 | 1460 |
| 36 | 2606 |
| 37 | 4701 |
| 38 | 8241 |
| 39 | 14516 |
| 40 | 25099 |
| 41 | 43569 |
| 42 | 74836 |
| 43 | 129038 |
| 44 | 221635 |
| 45 | 383114 |
| 46 | 664032 |
| 47 | 1163714 |
| 48 | 2060522 |
| 49 | 3712178 |
| 50 | 6810236 |
| 51 | 12785353 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,5,9,26,51,112,214,425,778,1460,2606,4701,8241, 14516,25099,43569,74836,129038,221635,383114, 664032,1163714,2060522,3712178,6810236,12785353] |