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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 0 |
| 2 | 8 |
| 3 | 14 |
| 4 | 63 |
| 5 | 62 |
| 6 | 252 |
| 7 | 254 |
| 8 | 766 |
| 9 | 2040 |
| 10 | 4095 |
| 11 | 4094 |
| 12 | 12286 |
| 13 | 32750 |
| 14 | 32764 |
| 15 | 65534 |
| 16 | 262141 |
| 17 | 262140 |
| 18 | 1048574 |
| 19 | 2097150 |
| 20 | 7340030 |
| 21 | 8388602 |
| 22 | 25165820 |
| 23 | 33554428 |
| 24 | 67108860 |
| 25 | 134217696 |
| 26 | 268435420 |
| 27 | 268435452 |
| 28 | 1073741790 |
| 29 | 1073741820 |
| 30 | 3221225470 |
| 31 | 8589934590 |
[2,0,8,14,63,62,252,254,766,2040,4095,4094,12286, 32750,32764,65534,262141,262140,1048574,2097150, 7340030,8388602,25165820,33554428,67108860, 134217696,268435420,268435452,1073741790, 1073741820,3221225470,8589934590] |