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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 15 |
| 5 | 1254 |
| 6 | 35 |
| 7 | 124410 |
| 8 | 1785 |
| 9 | 293930 |
| 10 | 4389 |
| 11 | 76945198890 |
| 12 | 5005 |
| 13 | 268585847923470 |
| 14 | 1430715 |
| 15 | 786511726 |
| 16 | 324429105 |
| 17 | 4898614781147856058290 |
| 18 | 1616615 |
| 19 | 10019369833301219786705310 |
| 20 | 1153293141 |
| 21 | 1814792979755470 |
| 22 | 500143792785 |
| 23 | 145057766844018138840041448806670 |
| 24 | 2714296585 |
[1,3,14,15,1254,35,124410,1785,293930,4389, 76945198890,5005,268585847923470,1430715, 786511726,324429105,4898614781147856058290, 1616615,10019369833301219786705310,1153293141, 1814792979755470,500143792785, 145057766844018138840041448806670,2714296585] |