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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 7 |
| 6 | 8 |
| 7 | 25 |
| 8 | 38 |
| 9 | 75 |
| 10 | 128 |
| 11 | 259 |
| 12 | 458 |
| 13 | 876 |
| 14 | 1598 |
| 15 | 3024 |
| 16 | 5672 |
| 17 | 10753 |
| 18 | 20372 |
| 19 | 38656 |
| 20 | 73547 |
| 21 | 140669 |
| 22 | 268537 |
| 23 | 514307 |
| 24 | 986379 |
| 25 | 1896755 |
| 26 | 3650109 |
| 27 | 7036061 |
| 28 | 13580371 |
| 29 | 26241380 |
| 30 | 50765806 |
| 31 | 98317489 |
| 32 | 190597373 |
| 33 | 369832498 |
| 34 | 718266991 |
| 35 | 1396138085 |
| 36 | 2715823187 |
| 37 | 5287080080 |
[0,0,1,2,2,7,8,25,38,75,128,259,458,876,1598,3024, 5672,10753,20372,38656,73547,140669,268537,514307, 986379,1896755,3650109,7036061,13580371,26241380, 50765806,98317489,190597373,369832498,718266991, 1396138085,2715823187,5287080080] |