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| n | a(n) |
|---|---|
| 0 | 16 |
| 1 | 85 |
| 2 | 567 |
| 3 | 3435 |
| 4 | 21935 |
| 5 | 136843 |
| 6 | 864671 |
| 7 | 5431499 |
| 8 | 34228999 |
| 9 | 215374371 |
| 10 | 1356329167 |
| 11 | 8537916907 |
| 12 | 53757639287 |
| 13 | 338436138739 |
| 14 | 2130795330527 |
| 15 | 13415038654331 |
| 16 | 84459841870343 |
| 17 | 531746080445251 |
| 18 | 3347809160159215 |
| 19 | 21077341291331531 |
| 20 | 132700223506346903 |
| 21 | 835462783565678867 |
| 22 | 5259963941120795903 |
[16,85,567,3435,21935,136843,864671,5431499, 34228999,215374371,1356329167,8537916907, 53757639287,338436138739,2130795330527, 13415038654331,84459841870343,531746080445251, 3347809160159215,21077341291331531, 132700223506346903,835462783565678867, 5259963941120795903] |