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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 56 |
| 5 | 132 |
| 6 | 156 |
| 7 | 756 |
| 8 | 2756 |
| 9 | 4556 |
| 10 | 6162 |
| 11 | 6972 |
| 12 | 7656 |
| 13 | 13572 |
| 14 | 21756 |
| 15 | 31152 |
| 16 | 33672 |
| 17 | 45156 |
| 18 | 61752 |
| 19 | 84972 |
| 20 | 153272 |
| 21 | 166872 |
| 22 | 279312 |
| 23 | 467172 |
| 24 | 626472 |
| 25 | 661782 |
| 26 | 1273512 |
| 27 | 1412532 |
| 28 | 1541322 |
| 29 | 1568756 |
| 30 | 1596432 |
| 31 | 1786232 |
| 32 | 1867322 |
| 33 | 2678132 |
| 34 | 2817362 |
| 35 | 3416952 |
| 36 | 3521252 |
[2,6,12,56,132,156,756,2756,4556,6162,6972,7656, 13572,21756,31152,33672,45156,61752,84972,153272, 166872,279312,467172,626472,661782,1273512, 1412532,1541322,1568756,1596432,1786232,1867322, 2678132,2817362,3416952,3521252] |