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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 67 |
| 3 | 323 |
| 4 | 1411 |
| 5 | 5891 |
| 6 | 24067 |
| 7 | 97283 |
| 8 | 391171 |
| 9 | 1568771 |
| 10 | 6283267 |
| 11 | 25149443 |
| 12 | 100630531 |
| 13 | 402587651 |
| 14 | 1610481667 |
| 15 | 6442188803 |
| 16 | 25769279491 |
| 17 | 103078166531 |
| 18 | 412314763267 |
| 19 | 1649263247363 |
| 20 | 6597061378051 |
| 21 | 26388262289411 |
[1,11,67,323,1411,5891,24067,97283,391171,1568771, 6283267,25149443,100630531,402587651,1610481667, 6442188803,25769279491,103078166531,412314763267, 1649263247363,6597061378051,26388262289411] |