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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 10 |
| 20 | 440 |
| 21 | 6160 |
| 22 | 40040 |
| 23 | 140140 |
| 24 | 280280 |
| 25 | 320320 |
| 26 | 194480 |
| 27 | 48620 |
| 28 | 0 |
| 29 | 100 |
| 30 | 9350 |
| 31 | 382800 |
| 32 | 9083800 |
| 33 | 142638320 |
| 34 | 1602400800 |
| 35 | 13556342800 |
| 36 | 89523519800 |
| 37 | 473679520600 |
| 38 | 2047398407340 |
| 39 | 7334909697400 |
| 40 | 22016582387800 |
[1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,10,440, 6160,40040,140140,280280,320320,194480,48620,0, 100,9350,382800,9083800,142638320,1602400800, 13556342800,89523519800,473679520600, 2047398407340,7334909697400,22016582387800] |