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| n | a(n) |
|---|---|
| 1 | 26 |
| 2 | 44 |
| 3 | 106 |
| 4 | 220 |
| 5 | 478 |
| 6 | 1044 |
| 7 | 2274 |
| 8 | 4940 |
| 9 | 10758 |
| 10 | 23412 |
| 11 | 50946 |
| 12 | 110876 |
| 13 | 241302 |
| 14 | 525140 |
| 15 | 1142866 |
| 16 | 2487228 |
| 17 | 5412966 |
| 18 | 11780276 |
| 19 | 25637506 |
| 20 | 55795100 |
| 21 | 121427318 |
| 22 | 264263252 |
| 23 | 575118258 |
| 24 | 1251634556 |
| 25 | 2723942534 |
| 26 | 5928138484 |
| 27 | 12901456482 |
| 28 | 28077545820 |
[26,44,106,220,478,1044,2274,4940,10758,23412, 50946,110876,241302,525140,1142866,2487228, 5412966,11780276,25637506,55795100,121427318, 264263252,575118258,1251634556,2723942534, 5928138484,12901456482,28077545820] |