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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 32 |
| 4 | 128 |
| 5 | 256 |
| 6 | 512 |
| 7 | 4096 |
| 8 | 32768 |
| 9 | 65536 |
| 10 | 131072 |
| 11 | 524288 |
| 12 | 2097152 |
| 13 | 4194304 |
| 14 | 8388608 |
| 15 | 134217728 |
| 16 | 2147483648 |
| 17 | 4294967296 |
| 18 | 8589934592 |
| 19 | 34359738368 |
| 20 | 137438953472 |
| 21 | 274877906944 |
| 22 | 549755813888 |
| 23 | 4398046511104 |
| 24 | 35184372088832 |
[4,8,32,128,256,512,4096,32768,65536,131072, 524288,2097152,4194304,8388608,134217728, 2147483648,4294967296,8589934592,34359738368, 137438953472,274877906944,549755813888, 4398046511104,35184372088832] |