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| n | a(n) |
|---|---|
| 1 | 177 |
| 2 | 270 |
| 3 | 491 |
| 4 | 884 |
| 5 | 1696 |
| 6 | 3376 |
| 7 | 6668 |
| 8 | 13654 |
| 9 | 28636 |
| 10 | 60436 |
| 11 | 129004 |
| 12 | 277490 |
| 13 | 598982 |
| 14 | 1298324 |
| 15 | 2822028 |
| 16 | 6143688 |
| 17 | 13394892 |
| 18 | 29231560 |
| 19 | 63828278 |
| 20 | 139443252 |
| 21 | 304733610 |
| 22 | 666090304 |
| 23 | 1456209450 |
| 24 | 3183921392 |
| 25 | 6961973124 |
| 26 | 15224014438 |
| 27 | 33292204686 |
[177,270,491,884,1696,3376,6668,13654,28636,60436, 129004,277490,598982,1298324,2822028,6143688, 13394892,29231560,63828278,139443252,304733610, 666090304,1456209450,3183921392,6961973124, 15224014438,33292204686] |