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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 19 |
| 3 | 115 |
| 4 | 499 |
| 5 | 2035 |
| 6 | 8179 |
| 7 | 32755 |
| 8 | 131059 |
| 9 | 524275 |
| 10 | 2097139 |
| 11 | 8388595 |
| 12 | 33554419 |
| 13 | 134217715 |
| 14 | 536870899 |
| 15 | 2147483635 |
| 16 | 8589934579 |
| 17 | 34359738355 |
| 18 | 137438953459 |
| 19 | 549755813875 |
| 20 | 2199023255539 |
| 21 | 8796093022195 |
| 22 | 35184372088819 |
| 23 | 140737488355315 |
| 24 | 562949953421299 |
[1,3,19,115,499,2035,8179,32755,131059,524275, 2097139,8388595,33554419,134217715,536870899, 2147483635,8589934579,34359738355,137438953459, 549755813875,2199023255539,8796093022195, 35184372088819,140737488355315,562949953421299] |