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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 28 |
| 4 | 41 |
| 5 | 84 |
| 6 | 336 |
| 7 | 990 |
| 8 | 193 |
| 9 | 1260 |
| 10 | 5905 |
| 11 | 75918 |
| 12 | 10065 |
| 13 | 318860 |
| 14 | 2391485 |
| 15 | 14348908 |
| 16 | 20390382 |
| 17 | 5031420 |
| 18 | 31624326 |
| 19 | 5985168 |
| 20 | 1743333144 |
| 21 | 8569036 |
| 22 | 668070480 |
| 23 | 547062516 |
| 24 | 141214768241 |
| 25 | 167874004756 |
| 26 | 1270932914165 |
| 27 | 385131186110 |
| 28 | 2837770056420 |
| 29 | 784347169884 |
| 30 | 475536631360 |
| 31 | 149093578413164 |
| 32 | 139370386996590 |
[4,5,28,41,84,336,990,193,1260,5905,75918,10065, 318860,2391485,14348908,20390382,5031420,31624326, 5985168,1743333144,8569036,668070480,547062516, 141214768241,167874004756,1270932914165, 385131186110,2837770056420,784347169884, 475536631360,149093578413164,139370386996590] |