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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 13 |
| 4 | 60 |
| 5 | 59 |
| 6 | 250 |
| 7 | 505 |
| 8 | 2040 |
| 9 | 1015 |
| 10 | 4086 |
| 11 | 8181 |
| 12 | 32756 |
| 13 | 32755 |
| 14 | 131058 |
| 15 | 262129 |
| 16 | 1048560 |
| 17 | 262127 |
| 18 | 1048558 |
| 19 | 2097133 |
| 20 | 8388588 |
| 21 | 8388587 |
| 22 | 33554410 |
| 23 | 67108841 |
| 24 | 268435432 |
| 25 | 134217703 |
| 26 | 536870886 |
| 27 | 1073741797 |
| 28 | 4294967268 |
| 29 | 4294967267 |
| 30 | 17179869154 |
| 31 | 34359738337 |
| 32 | 137438953440 |
[1,6,13,60,59,250,505,2040,1015,4086,8181,32756, 32755,131058,262129,1048560,262127,1048558, 2097133,8388588,8388587,33554410,67108841, 268435432,134217703,536870886,1073741797, 4294967268,4294967267,17179869154,34359738337, 137438953440] |