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| n | a(n) |
|---|---|
| 1 | 162 |
| 2 | 970 |
| 3 | 6138 |
| 4 | 36988 |
| 5 | 224714 |
| 6 | 1371258 |
| 7 | 8335676 |
| 8 | 50707346 |
| 9 | 308646310 |
| 10 | 1877813892 |
| 11 | 11425402866 |
| 12 | 69522265266 |
| 13 | 423014974740 |
| 14 | 2573883848370 |
| 15 | 15661241415990 |
| 16 | 95293069634608 |
| 17 | 579824378872438 |
| 18 | 3528028603215862 |
| 19 | 21466809826900456 |
[162,970,6138,36988,224714,1371258,8335676, 50707346,308646310,1877813892,11425402866, 69522265266,423014974740,2573883848370, 15661241415990,95293069634608,579824378872438, 3528028603215862,21466809826900456] |