The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 9 |
| 3 | 21 |
| 4 | 42 |
| 5 | 72 |
| 6 | 114 |
| 7 | 171 |
| 8 | 243 |
| 9 | 333 |
| 10 | 444 |
| 11 | 576 |
| 12 | 732 |
| 13 | 915 |
| 14 | 1125 |
| 15 | 1365 |
| 16 | 1638 |
| 17 | 1944 |
| 18 | 2286 |
| 19 | 2667 |
| 20 | 3087 |
| 21 | 3549 |
| 22 | 4056 |
| 23 | 4608 |
| 24 | 5208 |
| 25 | 5859 |
| 26 | 6561 |
| 27 | 7317 |
| 28 | 8130 |
| 29 | 9000 |
| 30 | 9930 |
| 31 | 10923 |
| 32 | 11979 |
| 33 | 13101 |
| 34 | 14292 |
| 35 | 15552 |
| 36 | 16884 |
| 37 | 18291 |
| 38 | 19773 |
| 39 | 21333 |
| 40 | 22974 |
| 41 | 24696 |
[0,3,9,21,42,72,114,171,243,333,444,576,732,915, 1125,1365,1638,1944,2286,2667,3087,3549,4056,4608, 5208,5859,6561,7317,8130,9000,9930,10923,11979, 13101,14292,15552,16884,18291,19773,21333,22974, 24696] |