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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 12 |
| 5 | 16 |
| 6 | 30 |
| 7 | 48 |
| 8 | 60 |
| 9 | 168 |
| 10 | 240 |
| 11 | 256 |
| 12 | 510 |
| 13 | 768 |
| 14 | 1020 |
| 15 | 3840 |
| 16 | 4080 |
| 17 | 14880 |
| 18 | 65280 |
| 19 | 65536 |
| 20 | 131070 |
| 21 | 196608 |
| 22 | 262140 |
| 23 | 983040 |
| 24 | 1048560 |
| 25 | 16711680 |
| 26 | 16776960 |
| 27 | 4294901760 |
| 28 | 4294967296 |
| 29 | 7608944640 |
| 30 | 8589934590 |
| 31 | 12884901888 |
| 32 | 17179869180 |
[2,4,6,12,16,30,48,60,168,240,256,510,768,1020, 3840,4080,14880,65280,65536,131070,196608,262140, 983040,1048560,16711680,16776960,4294901760, 4294967296,7608944640,8589934590,12884901888, 17179869180] |