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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 19 |
| 3 | 77 |
| 4 | 313 |
| 5 | 1277 |
| 6 | 5215 |
| 7 | 21305 |
| 8 | 87049 |
| 9 | 355685 |
| 10 | 1453363 |
| 11 | 5938613 |
| 12 | 24265921 |
| 13 | 99153677 |
| 14 | 405154783 |
| 15 | 1655515121 |
| 16 | 6764650225 |
| 17 | 27641241413 |
| 18 | 112945711027 |
| 19 | 461510880221 |
| 20 | 1885793543785 |
| 21 | 7705597945181 |
| 22 | 31486076453887 |
| 23 | 128656207802537 |
[5,19,77,313,1277,5215,21305,87049,355685,1453363, 5938613,24265921,99153677,405154783,1655515121, 6764650225,27641241413,112945711027,461510880221, 1885793543785,7705597945181,31486076453887, 128656207802537] |