| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 7 |
| 4 | 19 |
| 5 | 35 |
| 6 | 95 |
| 7 | 223 |
| 8 | 571 |
| 9 | 1535 |
| 10 | 4091 |
| 11 | 11247 |
| 12 | 31195 |
| 13 | 86931 |
| 14 | 244295 |
| 15 | 688227 |
| 16 | 1944479 |
| 17 | 5504723 |
| 18 | 15600559 |
| 19 | 44253807 |
| 20 | 125605043 |
| 21 | 356642407 |
| 22 | 1012929987 |
| 23 | 2877423319 |
| 24 | 8174903459 |
| 25 | 23227280955 |
| 26 | 65999249359 |
| 27 | 187541203227 |
| 28 | 532924811479 |
[1,7,7,19,35,95,223,571,1535,4091,11247,31195, 86931,244295,688227,1944479,5504723,15600559, 44253807,125605043,356642407,1012929987, 2877423319,8174903459,23227280955,65999249359, 187541203227,532924811479] |