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| n | a(n) |
|---|---|
| 2 | 5 |
| 3 | 5 |
| 4 | 13 |
| 5 | 29 |
| 6 | 61 |
| 7 | 2097143 |
| 8 | 1679609 |
| 9 | 509 |
| 10 | 1021 |
| 11 | 8589934583 |
| 12 | 4093 |
| 13 | 67108859 |
| 14 | 16381 |
| 15 | 470184984569 |
| 16 | 4294967291 |
| 17 | 2218611106740436979 |
| 18 | 68719476731 |
| 19 | 1350851717672992079 |
| 20 | 1048573 |
| 21 | 10460353199 |
| 22 | 4194301 |
| 23 | 20013311644049280264138724244295359 |
| 24 | 16777213 |
| 25 | 108347059433883722041830239 |
| 26 | 20282409603651670423947251285999 |
| 27 | 58149737003040059690390159 |
| 28 | 72057594037927931 |
| 29 | 536870909 |
| 30 | 999999999999999999999999999989 |
[5,5,13,29,61,2097143,1679609,509,1021,8589934583, 4093,67108859,16381,470184984569,4294967291, 2218611106740436979,68719476731, 1350851717672992079,1048573,10460353199,4194301, 20013311644049280264138724244295359,16777213, 108347059433883722041830239, 20282409603651670423947251285999, 58149737003040059690390159,72057594037927931, 536870909,999999999999999999999999999989] |