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A268260 as a simple table
| n | a(n) |
|---|---|
| 1 | 57 |
| 2 | 407 |
| 3 | 2907 |
| 4 | 20771 |
| 5 | 148468 |
| 6 | 1061632 |
| 7 | 7594224 |
| 8 | 54345509 |
| 9 | 389060724 |
| 10 | 2786424182 |
| 11 | 19964380499 |
| 12 | 143102062257 |
| 13 | 1026171833136 |
| 14 | 7361751375225 |
| 15 | 52836226761762 |
| 16 | 379380311345241 |
| 17 | 2725291071400498 |
| 18 | 19586141747713834 |
| 19 | 140826889434423348 |
[57,407,2907,20771,148468,1061632,7594224, 54345509,389060724,2786424182,19964380499, 143102062257,1026171833136,7361751375225, 52836226761762,379380311345241,2725291071400498, 19586141747713834,140826889434423348] |