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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 10 |
| 4 | 23 |
| 5 | 57 |
| 6 | 122 |
| 7 | 275 |
| 8 | 623 |
| 9 | 1394 |
| 10 | 3133 |
| 11 | 7045 |
| 12 | 15824 |
| 13 | 35557 |
| 14 | 79901 |
| 15 | 179530 |
| 16 | 403401 |
| 17 | 906439 |
| 18 | 2036744 |
| 19 | 4576523 |
| 20 | 10283359 |
| 21 | 23106492 |
| 22 | 51919817 |
| 23 | 116662775 |
| 24 | 262138870 |
| 25 | 589020695 |
| 26 | 1323517493 |
| 27 | 2973916806 |
| 28 | 6682330407 |
| 29 | 15015060135 |
| 30 | 33738533866 |
[1,7,10,23,57,122,275,623,1394,3133,7045,15824, 35557,79901,179530,403401,906439,2036744,4576523, 10283359,23106492,51919817,116662775,262138870, 589020695,1323517493,2973916806,6682330407, 15015060135,33738533866] |