The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 15 |
| 1 | 315 |
| 2 | 1287 |
| 3 | 3315 |
| 4 | 6783 |
| 5 | 12075 |
| 6 | 19575 |
| 7 | 29667 |
| 8 | 42735 |
| 9 | 59163 |
| 10 | 79335 |
| 11 | 103635 |
| 12 | 132447 |
| 13 | 166155 |
| 14 | 205143 |
| 15 | 249795 |
| 16 | 300495 |
| 17 | 357627 |
| 18 | 421575 |
| 19 | 492723 |
| 20 | 571455 |
| 21 | 658155 |
| 22 | 753207 |
| 23 | 856995 |
| 24 | 969903 |
| 25 | 1092315 |
| 26 | 1224615 |
| 27 | 1367187 |
| 28 | 1520415 |
| 29 | 1684683 |
| 30 | 1860375 |
| 31 | 2047875 |
| 32 | 2247567 |
| 33 | 2459835 |
[15,315,1287,3315,6783,12075,19575,29667,42735, 59163,79335,103635,132447,166155,205143,249795, 300495,357627,421575,492723,571455,658155,753207, 856995,969903,1092315,1224615,1367187,1520415, 1684683,1860375,2047875,2247567,2459835] |