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A028342 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 59 |
| 5 | 339 |
| 6 | 2629 |
| 7 | 20677 |
| 8 | 202089 |
| 9 | 2066201 |
| 10 | 24322931 |
| 11 | 296746251 |
| 12 | 4193572723 |
| 13 | 59806188571 |
| 14 | 954679763829 |
| 15 | 15845349818789 |
| 16 | 285841314451409 |
| 17 | 5293203821406897 |
| 18 | 106976406006818659 |
| 19 | 2201383054398314251 |
[1,1,3,11,59,339,2629,20677,202089,2066201, 24322931,296746251,4193572723,59806188571, 954679763829,15845349818789,285841314451409, 5293203821406897,106976406006818659, 2201383054398314251] |