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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 4 |
| 3 | 6 |
| 4 | 16 |
| 5 | 30 |
| 6 | 64 |
| 7 | 126 |
| 8 | 256 |
| 9 | 510 |
| 10 | 1024 |
| 11 | 2046 |
| 12 | 4096 |
| 13 | 8190 |
| 14 | 16384 |
| 15 | 32766 |
| 16 | 65536 |
| 17 | 131070 |
| 18 | 262144 |
| 19 | 524286 |
| 20 | 1048576 |
| 21 | 2097150 |
| 22 | 4194304 |
| 23 | 8388606 |
| 24 | 16777216 |
| 25 | 33554430 |
| 26 | 67108864 |
| 27 | 134217726 |
| 28 | 268435456 |
| 29 | 536870910 |
| 30 | 1073741824 |
| 31 | 2147483646 |
[1,0,4,6,16,30,64,126,256,510,1024,2046,4096,8190, 16384,32766,65536,131070,262144,524286,1048576, 2097150,4194304,8388606,16777216,33554430, 67108864,134217726,268435456,536870910,1073741824, 2147483646] |