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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 9 |
| 7 | 18 |
| 8 | 34 |
| 9 | 58 |
| 10 | 100 |
| 11 | 164 |
| 12 | 265 |
| 13 | 421 |
| 14 | 657 |
| 15 | 1015 |
| 16 | 1549 |
| 17 | 2343 |
| 18 | 3515 |
| 19 | 5234 |
| 20 | 7745 |
| 21 | 11393 |
| 22 | 16673 |
| 23 | 24285 |
| 24 | 35220 |
| 25 | 50880 |
| 26 | 73238 |
| 27 | 105073 |
| 28 | 150286 |
| 29 | 214346 |
| 30 | 304910 |
| 31 | 432677 |
| 32 | 612581 |
| 33 | 865435 |
| 34 | 1220209 |
| 35 | 1717180 |
| 36 | 2412276 |
| 37 | 3383076 |
| 38 | 4737076 |
| 39 | 6623076 |
| 40 | 9246855 |
[0,0,0,1,1,5,9,18,34,58,100,164,265,421,657,1015, 1549,2343,3515,5234,7745,11393,16673,24285,35220, 50880,73238,105073,150286,214346,304910,432677, 612581,865435,1220209,1717180,2412276,3383076, 4737076,6623076,9246855] |