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A301666 as a simple table
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 61 |
| 3 | 407 |
| 4 | 2793 |
| 5 | 21224 |
| 6 | 146841 |
| 7 | 1073621 |
| 8 | 7703565 |
| 9 | 55506215 |
| 10 | 399555430 |
| 11 | 2875870497 |
| 12 | 20706418377 |
| 13 | 149059329261 |
| 14 | 1073124611823 |
| 15 | 7725565402834 |
| 16 | 55617663607353 |
| 17 | 400401309675815 |
| 18 | 2882556650714509 |
| 19 | 20752023117855145 |
[3,61,407,2793,21224,146841,1073621,7703565, 55506215,399555430,2875870497,20706418377, 149059329261,1073124611823,7725565402834, 55617663607353,400401309675815,2882556650714509, 20752023117855145] |