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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 11 |
| 3 | 53 |
| 4 | 203 |
| 5 | 821 |
| 6 | 3275 |
| 7 | 13109 |
| 8 | 52427 |
| 9 | 209717 |
| 10 | 838859 |
| 11 | 3355445 |
| 12 | 13421771 |
| 13 | 53687093 |
| 14 | 214748363 |
| 15 | 858993461 |
| 16 | 3435973835 |
| 17 | 13743895349 |
| 18 | 54975581387 |
| 19 | 219902325557 |
| 20 | 879609302219 |
| 21 | 3518437208885 |
| 22 | 14073748835531 |
| 23 | 56294995342133 |
[5,11,53,203,821,3275,13109,52427,209717,838859, 3355445,13421771,53687093,214748363,858993461, 3435973835,13743895349,54975581387,219902325557, 879609302219,3518437208885,14073748835531, 56294995342133] |