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| n | a(n) |
|---|---|
| 1 | 21815361 |
| 2 | 76258263901 |
| 3 | 266534819947777 |
| 4 | 932029892451556289 |
| 5 | 3259355143558953645273 |
| 6 | 11398269977304081985788081 |
| 7 | 39860904095207157826344048581 |
| 8 | 139397673605040868918753655944293 |
[21815361,76258263901,266534819947777, 932029892451556289,3259355143558953645273, 11398269977304081985788081, 39860904095207157826344048581, 139397673605040868918753655944293] |