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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 27 |
| 2 | 157 |
| 3 | 915 |
| 4 | 5333 |
| 5 | 31083 |
| 6 | 181165 |
| 7 | 1055907 |
| 8 | 6154277 |
| 9 | 35869755 |
| 10 | 209064253 |
| 11 | 1218515763 |
| 12 | 7102030325 |
| 13 | 41393666187 |
| 14 | 241259966797 |
| 15 | 1406166134595 |
| 16 | 8195736840773 |
| 17 | 47768254910043 |
| 18 | 278413792619485 |
| 19 | 1622714500806867 |
| 20 | 9457873212221717 |
| 21 | 55124524772523435 |
| 22 | 321289275422918893 |
[5,27,157,915,5333,31083,181165,1055907,6154277, 35869755,209064253,1218515763,7102030325, 41393666187,241259966797,1406166134595, 8195736840773,47768254910043,278413792619485, 1622714500806867,9457873212221717, 55124524772523435,321289275422918893] |