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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 52 |
| 3 | 200 |
| 4 | 784 |
| 5 | 3052 |
| 6 | 11900 |
| 7 | 46432 |
| 8 | 181184 |
| 9 | 707044 |
| 10 | 2759212 |
| 11 | 10767816 |
| 12 | 42021520 |
| 13 | 163989692 |
| 14 | 639972924 |
| 15 | 2497507216 |
| 16 | 9746573088 |
| 17 | 38036202612 |
| 18 | 148437067820 |
| 19 | 579278732344 |
| 20 | 2260647259184 |
| 21 | 8822222791628 |
| 22 | 34428907339516 |
| 23 | 134359524664384 |
[16,52,200,784,3052,11900,46432,181184,707044, 2759212,10767816,42021520,163989692,639972924, 2497507216,9746573088,38036202612,148437067820, 579278732344,2260647259184,8822222791628, 34428907339516,134359524664384] |