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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 3 |
| 3 | 6 |
| 4 | 18 |
| 5 | 24 |
| 6 | 60 |
| 7 | 120 |
| 8 | 216 |
| 9 | 480 |
| 10 | 912 |
| 11 | 1824 |
| 12 | 3744 |
| 13 | 7296 |
| 14 | 14784 |
| 15 | 29568 |
| 16 | 58752 |
| 17 | 118272 |
| 18 | 235776 |
| 19 | 471552 |
| 20 | 944640 |
| 21 | 1886208 |
| 22 | 3775488 |
| 23 | 7550976 |
| 24 | 15095808 |
| 25 | 30203904 |
| 26 | 60395520 |
| 27 | 120791040 |
| 28 | 241606656 |
| 29 | 483164160 |
| 30 | 966377472 |
| 31 | 1932754944 |
| 32 | 3865411584 |
| 33 | 7731019776 |
| 34 | 15461842944 |
[0,3,3,6,18,24,60,120,216,480,912,1824,3744,7296, 14784,29568,58752,118272,235776,471552,944640, 1886208,3775488,7550976,15095808,30203904, 60395520,120791040,241606656,483164160,966377472, 1932754944,3865411584,7731019776,15461842944] |