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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 24 |
| 7 | 51 |
| 8 | 85 |
| 9 | 146 |
| 10 | 254 |
| 11 | 520 |
| 12 | 769 |
| 13 | 1557 |
| 14 | 2561 |
| 15 | 3997 |
| 16 | 5333 |
| 17 | 10705 |
| 18 | 14633 |
| 19 | 29315 |
| 20 | 40970 |
| 21 | 60722 |
| 22 | 95912 |
| 23 | 191902 |
| 24 | 242769 |
| 25 | 339909 |
| 26 | 532088 |
| 27 | 677224 |
| 28 | 917112 |
| 29 | 1834373 |
| 30 | 2332596 |
| 31 | 4665375 |
| 32 | 5529352 |
| 33 | 7864049 |
| 34 | 12164824 |
| 35 | 16422587 |
| 36 | 19595164 |
| 37 | 39190653 |
| 38 | 60465758 |
[0,0,1,4,10,24,51,85,146,254,520,769,1557,2561, 3997,5333,10705,14633,29315,40970,60722,95912, 191902,242769,339909,532088,677224,917112,1834373, 2332596,4665375,5529352,7864049,12164824,16422587, 19595164,39190653,60465758] |