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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1048576 |
| 2 | 1073741824 |
| 3 | 61917364224 |
| 4 | 1099511627776 |
| 5 | 10240000000000 |
| 6 | 63403380965376 |
| 7 | 296196766695424 |
| 8 | 1125899906842624 |
| 9 | 3656158440062976 |
| 10 | 10485760000000000 |
| 11 | 27197360938418176 |
| 12 | 64925062108545024 |
| 13 | 144555105949057024 |
| 14 | 303305489096114176 |
| 15 | 604661760000000000 |
[0,1048576,1073741824,61917364224,1099511627776, 10240000000000,63403380965376,296196766695424, 1125899906842624,3656158440062976, 10485760000000000,27197360938418176, 64925062108545024,144555105949057024, 303305489096114176,604661760000000000] |