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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 14 |
| 4 | 35 |
| 5 | 76 |
| 6 | 164 |
| 7 | 336 |
| 8 | 687 |
| 9 | 1387 |
| 10 | 2792 |
| 11 | 5596 |
| 12 | 11220 |
| 13 | 22454 |
| 14 | 44932 |
| 15 | 89888 |
| 16 | 179807 |
| 17 | 359632 |
| 18 | 719303 |
| 19 | 1438626 |
| 20 | 2877294 |
| 21 | 5754620 |
| 22 | 11509276 |
| 23 | 23018576 |
| 24 | 46037212 |
| 25 | 92074455 |
| 26 | 184148952 |
| 27 | 368297944 |
| 28 | 736595944 |
| 29 | 1473191918 |
| 30 | 2946383908 |
[1,5,14,35,76,164,336,687,1387,2792,5596,11220, 22454,44932,89888,179807,359632,719303,1438626, 2877294,5754620,11509276,23018576,46037212, 92074455,184148952,368297944,736595944,1473191918, 2946383908] |