The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 36 |
| 3 | 162 |
| 4 | 516 |
| 5 | 1230 |
| 6 | 2430 |
| 7 | 3756 |
| 8 | 5862 |
| 9 | 9036 |
| 10 | 12822 |
| 11 | 16710 |
| 12 | 22182 |
| 13 | 28758 |
| 14 | 36144 |
| 15 | 45444 |
| 16 | 54966 |
| 17 | 66270 |
| 18 | 78870 |
| 19 | 93834 |
| 20 | 109866 |
| 21 | 127260 |
| 22 | 146412 |
| 23 | 169698 |
| 24 | 192366 |
| 25 | 218214 |
| 26 | 244752 |
| 27 | 273480 |
| 28 | 307224 |
| 29 | 341430 |
| 30 | 380988 |
| 31 | 420558 |
| 32 | 463350 |
| 33 | 510024 |
| 34 | 558090 |
| 35 | 611088 |
| 36 | 664494 |
| 37 | 723060 |
| 38 | 784014 |
| 39 | 844134 |
| 40 | 921486 |
[0,6,36,162,516,1230,2430,3756,5862,9036,12822, 16710,22182,28758,36144,45444,54966,66270,78870, 93834,109866,127260,146412,169698,192366,218214, 244752,273480,307224,341430,380988,420558,463350, 510024,558090,611088,664494,723060,784014,844134, 921486] |