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| n | a(n) |
|---|---|
| 0 | 19 |
| 1 | 39 |
| 2 | 1501 |
| 3 | 3041 |
| 4 | 117059 |
| 5 | 237159 |
| 6 | 9129101 |
| 7 | 18495361 |
| 8 | 711952819 |
| 9 | 1442400999 |
| 10 | 55523190781 |
| 11 | 112488782561 |
| 12 | 4330096928099 |
| 13 | 8772682638759 |
| 14 | 337692037200941 |
| 15 | 684156757040641 |
| 16 | 26335648804745299 |
| 17 | 53355454366531239 |
[19,39,1501,3041,117059,237159,9129101,18495361, 711952819,1442400999,55523190781,112488782561, 4330096928099,8772682638759,337692037200941, 684156757040641,26335648804745299, 53355454366531239] |