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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 16 |
| 4 | 128 |
| 5 | 256 |
| 6 | 16384 |
| 7 | 65536 |
| 8 | 268435456 |
| 9 | 4294967296 |
| 10 | 562949953421312 |
| 11 | 9007199254740992 |
| 12 | 72057594037927936 |
| 13 | 18446744073709551616 |
| 14 | 316912650057057350374175801344 |
| 15 | 81129638414606681695789005144064 |
| 16 | 5192296858534827628530496329220096 |
[1,4,16,128,256,16384,65536,268435456,4294967296, 562949953421312,9007199254740992, 72057594037927936,18446744073709551616, 316912650057057350374175801344, 81129638414606681695789005144064, 5192296858534827628530496329220096] |