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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 19 |
| 4 | 201 |
| 5 | 3176 |
| 6 | 69823 |
| 7 | 2026249 |
| 8 | 74565473 |
| 9 | 3376695763 |
| 10 | 183991725451 |
| 11 | 11854772145800 |
| 12 | 890415496931689 |
| 13 | 77023751991841669 |
| 14 | 7592990698770559111 |
| 15 | 845240026276785888451 |
| 16 | 105409073489605774592897 |
| 17 | 14625467507717709778793020 |
| 18 | 2244123413703647502288608467 |
| 19 | 378751257186051653931253015229 |
[1,1,3,19,201,3176,69823,2026249,74565473, 3376695763,183991725451,11854772145800, 890415496931689,77023751991841669, 7592990698770559111,845240026276785888451, 105409073489605774592897, 14625467507717709778793020, 2244123413703647502288608467, 378751257186051653931253015229] |