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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 140 |
| 6 | 440 |
| 7 | 700 |
| 8 | 1650 |
| 9 | 2304 |
| 10 | 5180 |
| 11 | 3960 |
| 12 | 3900 |
| 13 | 14400 |
| 14 | 15600 |
| 15 | 43560 |
| 16 | 39600 |
| 17 | 57600 |
| 18 | 56700 |
| 19 | 81900 |
| 20 | 25200 |
| 21 | 112896 |
| 22 | 100100 |
| 23 | 177840 |
| 24 | 198000 |
| 25 | 411840 |
| 26 | 222768 |
| 27 | 226800 |
| 28 | 637560 |
| 29 | 752400 |
| 30 | 556920 |
| 31 | 907200 |
| 32 | 409500 |
| 33 | 565488 |
| 34 | 1306800 |
| 35 | 1984500 |
| 36 | 1884960 |
[1,2,4,16,64,140,440,700,1650,2304,5180,3960,3900, 14400,15600,43560,39600,57600,56700,81900,25200, 112896,100100,177840,198000,411840,222768,226800, 637560,752400,556920,907200,409500,565488,1306800, 1984500,1884960] |