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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 72 |
| 4 | 166 |
| 5 | 360 |
| 6 | 660 |
| 7 | 1292 |
| 8 | 2400 |
| 9 | 4396 |
| 10 | 8096 |
| 11 | 14580 |
| 12 | 26346 |
| 13 | 47336 |
| 14 | 84502 |
| 15 | 150976 |
| 16 | 268594 |
| 17 | 477130 |
| 18 | 846850 |
| 19 | 1500112 |
| 20 | 2655880 |
| 21 | 4697786 |
| 22 | 8303004 |
| 23 | 14669200 |
| 24 | 25901790 |
| 25 | 45719422 |
| 26 | 80675866 |
| 27 | 142317030 |
| 28 | 251007562 |
| 29 | 442623618 |
| 30 | 780396916 |
| 31 | 1375769956 |
[6,36,72,166,360,660,1292,2400,4396,8096,14580, 26346,47336,84502,150976,268594,477130,846850, 1500112,2655880,4697786,8303004,14669200,25901790, 45719422,80675866,142317030,251007562,442623618, 780396916,1375769956] |