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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 29 |
| 7 | 55 |
| 8 | 153 |
| 9 | 307 |
| 10 | 588 |
| 11 | 1018 |
| 12 | 2230 |
| 13 | 3543 |
| 14 | 6878 |
| 15 | 11216 |
| 16 | 20615 |
| 17 | 33355 |
| 18 | 57980 |
| 19 | 90194 |
| 20 | 155176 |
| 21 | 239327 |
| 22 | 395473 |
| 23 | 604113 |
| 24 | 970294 |
| 25 | 1453749 |
| 26 | 2323476 |
| 27 | 3425849 |
| 28 | 5349414 |
| 29 | 7905133 |
| 30 | 11963861 |
| 31 | 17521274 |
| 32 | 26472001 |
| 33 | 38054619 |
| 34 | 56756488 |
| 35 | 81683457 |
| 36 | 119005220 |
| 37 | 170498286 |
| 38 | 247619748 |
[0,0,1,4,10,29,55,153,307,588,1018,2230,3543,6878, 11216,20615,33355,57980,90194,155176,239327, 395473,604113,970294,1453749,2323476,3425849, 5349414,7905133,11963861,17521274,26472001, 38054619,56756488,81683457,119005220,170498286, 247619748] |