The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 27 |
| 2 | 210 |
| 3 | 822 |
| 4 | 2328 |
| 5 | 5433 |
| 6 | 11130 |
| 7 | 20748 |
| 8 | 36000 |
| 9 | 59031 |
| 10 | 92466 |
| 11 | 139458 |
| 12 | 203736 |
| 13 | 289653 |
| 14 | 402234 |
| 15 | 547224 |
| 16 | 731136 |
| 17 | 961299 |
| 18 | 1245906 |
| 19 | 1594062 |
| 20 | 2015832 |
| 21 | 2522289 |
| 22 | 3125562 |
| 23 | 3838884 |
| 24 | 4676640 |
| 25 | 5654415 |
| 26 | 6789042 |
| 27 | 8098650 |
| 28 | 9602712 |
| 29 | 11322093 |
| 30 | 13279098 |
[0,27,210,822,2328,5433,11130,20748,36000,59031, 92466,139458,203736,289653,402234,547224,731136, 961299,1245906,1594062,2015832,2522289,3125562, 3838884,4676640,5654415,6789042,8098650,9602712, 11322093,13279098] |