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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 53 |
| 4 | 243 |
| 5 | 1075 |
| 6 | 5051 |
| 7 | 23183 |
| 8 | 110405 |
| 9 | 517269 |
| 10 | 2484517 |
| 11 | 11792641 |
| 12 | 56977377 |
| 13 | 272851117 |
| 14 | 1324046545 |
| 15 | 6381308549 |
| 16 | 31069554259 |
| 17 | 150465126731 |
| 18 | 734529518555 |
| 19 | 3570566608175 |
| 20 | 17468053878847 |
| 21 | 85166550969683 |
| 22 | 417399494671519 |
| 23 | 2040006648094923 |
| 24 | 10013114575982011 |
| 25 | 49036845449520447 |
| 26 | 241002038724658931 |
[1,3,13,53,243,1075,5051,23183,110405,517269, 2484517,11792641,56977377,272851117,1324046545, 6381308549,31069554259,150465126731,734529518555, 3570566608175,17468053878847,85166550969683, 417399494671519,2040006648094923, 10013114575982011,49036845449520447, 241002038724658931] |