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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 1 |
| 3 | 126 |
| 4 | 1 |
| 5 | 2046 |
| 6 | 1 |
| 7 | 32766 |
| 8 | 1 |
| 9 | 524286 |
| 10 | 1 |
| 11 | 8388606 |
| 12 | 1 |
| 13 | 134217726 |
| 14 | 1 |
| 15 | 2147483646 |
| 16 | 1 |
| 17 | 34359738366 |
| 18 | 1 |
| 19 | 549755813886 |
| 20 | 1 |
| 21 | 8796093022206 |
| 22 | 1 |
| 23 | 140737488355326 |
| 24 | 1 |
| 25 | 2251799813685246 |
| 26 | 1 |
| 27 | 36028797018963966 |
| 28 | 1 |
| 29 | 576460752303423486 |
| 30 | 1 |
| 31 | 9223372036854775806 |
| 32 | 1 |
[1,6,1,126,1,2046,1,32766,1,524286,1,8388606,1, 134217726,1,2147483646,1,34359738366,1, 549755813886,1,8796093022206,1,140737488355326,1, 2251799813685246,1,36028797018963966,1, 576460752303423486,1,9223372036854775806,1] |