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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 80 |
| 3 | 202 |
| 4 | 476 |
| 5 | 1082 |
| 6 | 2470 |
| 7 | 5562 |
| 8 | 12796 |
| 9 | 29044 |
| 10 | 67738 |
| 11 | 155328 |
| 12 | 366934 |
| 13 | 849090 |
| 14 | 2027430 |
| 15 | 4726368 |
| 16 | 11383748 |
| 17 | 26693878 |
| 18 | 64741904 |
| 19 | 152513458 |
| 20 | 371958154 |
| 21 | 879391758 |
| 22 | 2154278468 |
| 23 | 5107665568 |
| 24 | 12557355846 |
| 25 | 29839686200 |
| 26 | 73574774818 |
[24,80,202,476,1082,2470,5562,12796,29044,67738, 155328,366934,849090,2027430,4726368,11383748, 26693878,64741904,152513458,371958154,879391758, 2154278468,5107665568,12557355846,29839686200, 73574774818] |