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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 45 |
| 4 | 181 |
| 5 | 362 |
| 6 | 724 |
| 7 | 1448 |
| 8 | 2896 |
| 9 | 11585 |
| 10 | 23170 |
| 11 | 741455 |
| 12 | 1482910 |
| 13 | 11863283 |
| 14 | 23726566 |
| 15 | 189812531 |
| 16 | 379625062 |
| 17 | 97184015999 |
| 18 | 194368031998 |
| 19 | 3109888511975 |
| 20 | 99516432383215 |
| 21 | 199032864766430 |
| 22 | 1592262918131443 |
| 23 | 3184525836262886 |
[1,11,45,181,362,724,1448,2896,11585,23170,741455, 1482910,11863283,23726566,189812531,379625062, 97184015999,194368031998,3109888511975, 99516432383215,199032864766430,1592262918131443, 3184525836262886] |