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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 20 |
| 6 | 42 |
| 7 | 91 |
| 8 | 136 |
| 9 | 288 |
| 10 | 390 |
| 11 | 715 |
| 12 | 756 |
| 13 | 1508 |
| 14 | 1722 |
| 15 | 2835 |
| 16 | 3088 |
| 17 | 4896 |
| 18 | 4320 |
| 19 | 7923 |
| 20 | 8360 |
| 21 | 12180 |
| 22 | 12782 |
| 23 | 17963 |
| 24 | 16344 |
| 25 | 25600 |
| 26 | 26494 |
| 27 | 35451 |
| 28 | 36456 |
| 29 | 47908 |
| 30 | 38310 |
| 31 | 63395 |
| 32 | 64800 |
| 33 | 82368 |
| 34 | 84082 |
| 35 | 105315 |
| 36 | 99972 |
| 37 | 132756 |
| 38 | 135014 |
| 39 | 165243 |
| 40 | 167720 |
[0,1,3,8,20,42,91,136,288,390,715,756,1508,1722, 2835,3088,4896,4320,7923,8360,12180,12782,17963, 16344,25600,26494,35451,36456,47908,38310,63395, 64800,82368,84082,105315,99972,132756,135014, 165243,167720] |