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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 33 |
| 3 | 340 |
| 4 | 5261 |
| 5 | 104116 |
| 6 | 2133397 |
| 7 | 49873552 |
| 8 | 1290339353 |
| 9 | 35858779408 |
| 10 | 1073946466601 |
| 11 | 34411135594144 |
| 12 | 1169673799665637 |
| 13 | 42024908270673472 |
| 14 | 1589960095129885949 |
| 15 | 63097191029229655456 |
| 16 | 2618689624916494795313 |
| 17 | 113366790415884862467328 |
| 18 | 5107030221925521874906705 |
[1,1,33,340,5261,104116,2133397,49873552, 1290339353,35858779408,1073946466601, 34411135594144,1169673799665637,42024908270673472, 1589960095129885949,63097191029229655456, 2618689624916494795313,113366790415884862467328, 5107030221925521874906705] |