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| n | a(n) |
|---|---|
| 1 | 676 |
| 2 | 2042 |
| 3 | 6190 |
| 4 | 19312 |
| 5 | 58505 |
| 6 | 173903 |
| 7 | 503944 |
| 8 | 1397185 |
| 9 | 3802746 |
| 10 | 9816070 |
| 11 | 25016754 |
| 12 | 60535988 |
| 13 | 145230766 |
| 14 | 332520929 |
| 15 | 757040896 |
| 16 | 1655009001 |
| 17 | 3605466139 |
| 18 | 7587808715 |
| 19 | 15940578578 |
| 20 | 32532048134 |
| 21 | 66375799304 |
| 22 | 132239420396 |
[676,2042,6190,19312,58505,173903,503944,1397185, 3802746,9816070,25016754,60535988,145230766, 332520929,757040896,1655009001,3605466139, 7587808715,15940578578,32532048134,66375799304, 132239420396] |