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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 3 |
| 5 | 9 |
| 6 | 19 |
| 7 | 39 |
| 8 | 72 |
| 9 | 128 |
| 10 | 216 |
| 11 | 354 |
| 12 | 563 |
| 13 | 876 |
| 14 | 1335 |
| 15 | 1998 |
| 16 | 2946 |
| 17 | 4284 |
| 18 | 6154 |
| 19 | 8742 |
| 20 | 12294 |
| 21 | 17129 |
| 22 | 23667 |
| 23 | 32442 |
| 24 | 44151 |
| 25 | 59682 |
| 26 | 80169 |
| 27 | 107054 |
| 28 | 142167 |
| 29 | 187812 |
| 30 | 246895 |
| 31 | 323058 |
| 32 | 420852 |
| 33 | 545958 |
| 34 | 705438 |
| 35 | 908043 |
| 36 | 1164609 |
| 37 | 1488504 |
| 38 | 1896174 |
| 39 | 2407836 |
| 40 | 3048255 |
| 41 | 3847716 |
[1,3,9,19,39,72,128,216,354,563,876,1335,1998, 2946,4284,6154,8742,12294,17129,23667,32442,44151, 59682,80169,107054,142167,187812,246895,323058, 420852,545958,705438,908043,1164609,1488504, 1896174,2407836,3048255,3847716] |