The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 27 |
| 2 | 150 |
| 3 | 483 |
| 4 | 1188 |
| 5 | 2475 |
| 6 | 4602 |
| 7 | 7875 |
| 8 | 12648 |
| 9 | 19323 |
| 10 | 28350 |
| 11 | 40227 |
| 12 | 55500 |
| 13 | 74763 |
| 14 | 98658 |
| 15 | 127875 |
| 16 | 163152 |
| 17 | 205275 |
| 18 | 255078 |
| 19 | 313443 |
| 20 | 381300 |
| 21 | 459627 |
| 22 | 549450 |
| 23 | 651843 |
| 24 | 767928 |
| 25 | 898875 |
| 26 | 1045902 |
| 27 | 1210275 |
| 28 | 1393308 |
| 29 | 1596363 |
| 30 | 1820850 |
| 31 | 2068227 |
| 32 | 2340000 |
| 33 | 2637723 |
[0,27,150,483,1188,2475,4602,7875,12648,19323, 28350,40227,55500,74763,98658,127875,163152, 205275,255078,313443,381300,459627,549450,651843, 767928,898875,1045902,1210275,1393308,1596363, 1820850,2068227,2340000,2637723] |