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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 39 |
| 3 | 20 |
| 4 | 6 |
| 5 | 10 |
| 6 | 105 |
| 7 | 285 |
| 8 | 165 |
| 9 | 615 |
| 10 | 570 |
| 11 | 1482 |
| 12 | 1596 |
| 13 | 2706 |
| 14 | 3885 |
| 15 | 14790 |
| 16 | 19470 |
| 17 | 24090 |
| 18 | 19425 |
| 19 | 33630 |
| 20 | 33558 |
| 21 | 80178 |
| 22 | 134178 |
| 23 | 115878 |
| 24 | 151662 |
| 25 | 428090 |
| 26 | 418938 |
| 27 | 631470 |
| 28 | 672105 |
| 29 | 1366530 |
| 30 | 1006278 |
| 31 | 1461570 |
| 32 | 1155990 |
| 33 | 1718310 |
| 34 | 2382510 |
| 35 | 3344430 |
| 36 | 3669090 |
| 37 | 4441530 |
| 38 | 4562922 |
| 39 | 3545178 |
| 40 | 6087030 |
| 41 | 7945230 |
[1,2,39,20,6,10,105,285,165,615,570,1482,1596, 2706,3885,14790,19470,24090,19425,33630,33558, 80178,134178,115878,151662,428090,418938,631470, 672105,1366530,1006278,1461570,1155990,1718310, 2382510,3344430,3669090,4441530,4562922,3545178, 6087030,7945230] |