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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 8 |
| 4 | 6 |
| 5 | 0 |
| 6 | 48 |
| 7 | 72 |
| 8 | 39 |
| 9 | 272 |
| 10 | 600 |
| 11 | 624 |
| 12 | 1772 |
| 13 | 4416 |
| 14 | 6528 |
| 15 | 13488 |
| 16 | 32157 |
| 17 | 57504 |
| 18 | 110064 |
| 19 | 241848 |
| 20 | 471618 |
| 21 | 905280 |
| 22 | 1880112 |
| 23 | 3773112 |
| 24 | 7371427 |
| 25 | 14901552 |
| 26 | 30032904 |
| 27 | 59457632 |
| 28 | 119043912 |
| 29 | 239326080 |
| 30 | 477043584 |
| 31 | 953016288 |
| 32 | 1910769273 |
| 33 | 3818911040 |
| 34 | 7630062048 |
| 35 | 15274147560 |
| 36 | 30550681406 |
| 37 | 61067895168 |
| 38 | 122165728944 |
| 39 | 244373547432 |
[1,0,0,8,6,0,48,72,39,272,600,624,1772,4416,6528, 13488,32157,57504,110064,241848,471618,905280, 1880112,3773112,7371427,14901552,30032904, 59457632,119043912,239326080,477043584,953016288, 1910769273,3818911040,7630062048,15274147560, 30550681406,61067895168,122165728944,244373547432] |