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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 12 |
| 3 | 111 |
| 4 | 96 |
| 5 | 1919 |
| 6 | 768 |
| 7 | 31743 |
| 8 | 6144 |
| 9 | 516095 |
| 10 | 49152 |
| 11 | 8323071 |
| 12 | 393216 |
| 13 | 133693439 |
| 14 | 3145728 |
| 15 | 2143289343 |
| 16 | 25165824 |
| 17 | 34326183935 |
| 18 | 201326592 |
| 19 | 549487378431 |
| 20 | 1610612736 |
| 21 | 8793945538559 |
| 22 | 12884901888 |
| 23 | 140720308486143 |
| 24 | 103079215104 |
| 25 | 2251662374731775 |
| 26 | 824633720832 |
[1,5,12,111,96,1919,768,31743,6144,516095,49152, 8323071,393216,133693439,3145728,2143289343, 25165824,34326183935,201326592,549487378431, 1610612736,8793945538559,12884901888, 140720308486143,103079215104,2251662374731775, 824633720832] |