The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 15 |
| 4 | 63 |
| 5 | 120 |
| 6 | 143 |
| 7 | 360 |
| 8 | 440 |
| 9 | 840 |
| 10 | 1443 |
| 11 | 2303 |
| 12 | 3024 |
| 13 | 3843 |
| 14 | 5775 |
| 15 | 7055 |
| 16 | 7920 |
| 17 | 8463 |
| 18 | 9215 |
| 19 | 10200 |
| 20 | 15375 |
| 21 | 20735 |
| 22 | 23103 |
| 23 | 27224 |
| 24 | 28223 |
| 25 | 39600 |
| 26 | 42024 |
| 27 | 44520 |
| 28 | 50175 |
| 29 | 54288 |
| 30 | 63503 |
| 31 | 76175 |
| 32 | 82943 |
| 33 | 104328 |
| 34 | 108240 |
| 35 | 116280 |
| 36 | 142128 |
| 37 | 171395 |
| 38 | 178083 |
| 39 | 203400 |
[3,4,15,63,120,143,360,440,840,1443,2303,3024, 3843,5775,7055,7920,8463,9215,10200,15375,20735, 23103,27224,28223,39600,42024,44520,50175,54288, 63503,76175,82943,104328,108240,116280,142128, 171395,178083,203400] |