| n | a(n) |
|---|---|
| 1 | 26 |
| 2 | 48 |
| 3 | 68 |
| 4 | 126 |
| 5 | 468 |
| 6 | 866 |
| 7 | 1226 |
| 8 | 2268 |
| 9 | 8406 |
| 10 | 15548 |
| 11 | 22008 |
| 12 | 40706 |
| 13 | 150848 |
| 14 | 279006 |
| 15 | 394926 |
| 16 | 730448 |
| 17 | 2706866 |
| 18 | 5006568 |
| 19 | 7086668 |
| 20 | 13107366 |
| 21 | 48572748 |
| 22 | 89839226 |
| 23 | 127165106 |
| 24 | 235202148 |
| 25 | 871602606 |
| 26 | 1612099508 |
| 27 | 2281885248 |
| 28 | 4220531306 |
| 29 | 15640274168 |
| 30 | 28927951926 |
[26,48,68,126,468,866,1226,2268,8406,15548,22008, 40706,150848,279006,394926,730448,2706866,5006568, 7086668,13107366,48572748,89839226,127165106, 235202148,871602606,1612099508,2281885248, 4220531306,15640274168,28927951926] |