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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 6 |
| 2 | 10 |
| 3 | 22 |
| 4 | 46 |
| 5 | 93 |
| 6 | 202 |
| 7 | 407 |
| 8 | 849 |
| 9 | 1774 |
| 10 | 3693 |
| 11 | 7671 |
| 12 | 15999 |
| 13 | 33146 |
| 14 | 68703 |
| 15 | 142682 |
| 16 | 295003 |
| 17 | 610757 |
| 18 | 1261573 |
| 19 | 2603453 |
| 20 | 5369633 |
| 21 | 11058907 |
| 22 | 22758881 |
| 23 | 46796443 |
| 24 | 96132103 |
| 25 | 197329777 |
| 26 | 404737537 |
| 27 | 829538129 |
| 28 | 1698995201 |
| 29 | 3477431507 |
| 30 | 7113030933 |
| 31 | 14540737711 |
[4,6,10,22,46,93,202,407,849,1774,3693,7671,15999, 33146,68703,142682,295003,610757,1261573,2603453, 5369633,11058907,22758881,46796443,96132103, 197329777,404737537,829538129,1698995201, 3477431507,7113030933,14540737711] |