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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 11 |
| 9 | 14 |
| 10 | 24 |
| 11 | 30 |
| 12 | 44 |
| 13 | 57 |
| 14 | 84 |
| 15 | 102 |
| 16 | 145 |
| 17 | 180 |
| 18 | 241 |
| 19 | 302 |
| 20 | 403 |
| 21 | 494 |
| 22 | 648 |
| 23 | 796 |
| 24 | 1015 |
| 25 | 1253 |
| 26 | 1593 |
| 27 | 1941 |
| 28 | 2439 |
| 29 | 2969 |
| 30 | 3680 |
| 31 | 4477 |
| 32 | 5523 |
| 33 | 6672 |
| 34 | 8176 |
| 35 | 9847 |
| 36 | 11968 |
| 37 | 14385 |
| 38 | 17406 |
| 39 | 20816 |
| 40 | 25066 |
| 41 | 29896 |
| 42 | 35802 |
| 43 | 42587 |
| 44 | 50819 |
| 45 | 60214 |
| 46 | 71585 |
| 47 | 84594 |
| 48 | 100151 |
[0,0,0,1,2,4,6,11,14,24,30,44,57,84,102,145,180, 241,302,403,494,648,796,1015,1253,1593,1941,2439, 2969,3680,4477,5523,6672,8176,9847,11968,14385, 17406,20816,25066,29896,35802,42587,50819,60214, 71585,84594,100151] |