| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 25 |
| 4 | 73 |
| 5 | 209 |
| 6 | 603 |
| 7 | 1737 |
| 8 | 5013 |
| 9 | 14479 |
| 10 | 41867 |
| 11 | 121181 |
| 12 | 351103 |
| 13 | 1018259 |
| 14 | 2955967 |
| 15 | 8589139 |
| 16 | 24980429 |
| 17 | 72717883 |
| 18 | 211867481 |
| 19 | 617816561 |
| 20 | 1803089251 |
| 21 | 5266565421 |
| 22 | 15395024547 |
| 23 | 45036636735 |
| 24 | 131848195503 |
| 25 | 386273704299 |
| 26 | 1132449675153 |
| 27 | 3322275767287 |
| 28 | 9752944355363 |
| 29 | 28649005746629 |
| 30 | 84206904178073 |
[1,3,9,25,73,209,603,1737,5013,14479,41867,121181, 351103,1018259,2955967,8589139,24980429,72717883, 211867481,617816561,1803089251,5266565421, 15395024547,45036636735,131848195503,386273704299, 1132449675153,3322275767287,9752944355363, 28649005746629,84206904178073] |